Green Strategic Planning Approach for International Shipping Activities

: Sustainability is a long-term and ultimate goal for international shipping, although it is slowly making progress. The shipping perspective that moves away from “port-to-port” operations to “door-to-door” services also requires international shipping to take a long-term and holistic view instead of fragmented e ﬀ orts. How to achieve the long-term sustainability goal becomes a key issue for door-to-door international shipping. Hence, green strategic planning for door-to-door international shipping was proposed with green development that puts forward the eco-centric point of view as its basic theory for sustainability. This study used a strategic decision-making approach, a so-called multi-dimensional decision-making (MDDM), coupled with the life-cycle thinking and continual improvement of ISO 14000, to achieve strategic planning for door-to-door international shipping aiming at sustainability. A case study showed an example of potential framework and / or methodology for the door-to-door international shipping, which integrates green development principles into international shipping planning to reach the long-term goal of sustainability, and meet the needs of the “door-to-door” logistics. It not only points out the general environmental problems but also identiﬁes many critical issues for sustainability in international shipping. As a result, this study developed an approach and methods for sustainable door-to-door international shipping based on the proactively strategic decision-making associated with green development.


Introduction
Sustainability has been viewed as a long-term and ultimate goal of human beings [1], and green development and sustainable development have been the two prominent approaches to sustainability [2]. The most commonly used sustainable development serves a human being's needs through human governance [3]. However, this anthropocentric attitude ignores the essence of sustainability [4] and, hence, has been considered to be the root of environmental and ecological crises [5,6]. Sustainability considers eco-centrism to be its key pathway [7] and commits to the conservation of natural resources [4] because the natural ecosystem is fundamental to human existence [8]. In the meantime, green development has been theoretically based on non-anthropocentrism or eco-centrism and has been targeting nature conservation [2]. This point of view, which puts human beings as part of nature, has been proven to be a key to sustainability [7,9]. To achieve the sustainability goal and avoid the depletion of natural resources, we must place nature first [10], and work on the principles of "nature-center" and "maintenance of natural intrinsic value" following the green development approach [2].

Materials
In this study, all the data related to all shipping operations in the door-to-door life-cycle and the six dimensions in all areas of the life-cycle of logistics, including passing and transition areas, were collected from interviews, surveys, literature search, statistical yearbooks, annual reports, official documents, and online access to official websites of governments and other relevant organizations (as shown in Table A1 in the Appendix A).

Concept of Green Strategic Planning for International Shipping
International shipping is defined as the entire worldwide shipping process with marine transportation being involved [21,31]. This concept sets the shipping function, i.e., the conveyance of cargo from one place to another [32,33], into an international scope and serves more than 80% of world trade in terms of volume [34].
To acknowledge the concept of green development as a sustainability approach, green shipping has been proposed, which is based on the concept of green development rather than sustainable development in theory [2]. Furthermore, the concept of green shipping as defined by Wu et al. [2] provides a theoretical basis and objectives for green strategic planning in international shipping, which integrates a long-term goal, strategic decision-making, green development, and door-to-door services in order to actually achieve sustainability. Accordingly, door-to-door international shipping can be defined as an effort to generate strategies for door-to-door worldwide movements in accordance with the sustainability requirements, as below: • Emphasize the point of view of nature first and the green development approach rather than the satisfaction of human needs and aspirations [34], and acknowledge the intrinsic value of the natural ecosystem [7,35] to conserve natural resources and biodiversity [36,37]; • Make systematic strategic decisions for the green strategic planning of international shipping, instead of fragmented efforts [26], towards the long-term sustainability goals; and • Get the whole door-to-door international shipping process involved, i.e., shipping logistics supply from supply place to receipt place with ocean carriage being involved [21,31], rather than port-to-port shipping, to ensure sustainability throughout the whole process.
This definition is based on non-anthropocentrism and eco-centrism, considers human beings as part of nature, and aims at green development to real sustainability through the maintenance of a natural ecosystem's intrinsic value. This definition satisfies the challenge of the door-to-door shipping transition and the sustainability requirement with a long-term and ultimate goal in international shipping [24][25][26].

Principles
The principles of green strategic planning for international shipping are set up based on the following proposed concepts: • Value-focused thinking: This thinking is the decision-making basis [38]. Conservation cares about the natural intrinsic value [39]; • Resource-oriented principle: A resource is fundamental and essential to the sustainable development of concerns [40,41]. It helps define the objectives of regional development according to the characteristics of local resources [42]; • Strategic decision: Strategic planning is a systematic and long-term oriented process to formulate strategies [25]. Green shipping must use a strategic decision approach because sustainability is a long-term goal for human beings. The top-down strategic focus is a key component of strategic planning. It can be completed by combining with bottom-up information [43]; • Precautionary principle: This principle works through taking actions or measures even without enough understanding [44], which is critically important for international shipping, facing high uncertainties and complex global conditions; • Life-cycle assessment [45]: It is a necessity to consider the life-cycle of international shipping because of the seamless operations, and due to this, green shipping planning is not for port-to-port operation, but door-to-door service; • Continual improvement: This means "recurring activity to enhance performance" [46], which contributes to the dynamic strategic decision-making process for green development.

Establishment
As mentioned early, the current strategic planning approaches for international shipping are still limited to advising international shipping to meet the shipping transition and sustainability requirements [24]. A strategic decision-making approach, i.e., multi-dimensional decision-making (MDDM) approach, was applied to green strategic planning for door-to-door international shipping, which included: (1) identification of all relevant dimensions related to the goals or decision issues; (2) collection of all available data for all relevant dimensions; (3) retrospective assessment and current situation assessment; (4) generation of shipping alternatives; (5) integration of assessment in each dimension; and (6) decision-making [47]. This MDDM approach was proposed before for strategic decision-making processes and especially for regional and non-structured processes and has been effectively applied to several regional case studies in strategic decision-making [48,49].
Following the general MDDM logic framework and principles mentioned above, an approach for international shipping green strategic planning was developed in this study ( Figure 1). This framework embraces planning dimension identification, door-to-door international shipping life-cycle determination, data collection and assessment, decision-making, green strategic planning, and continual improvements.
Specifically, the environmental dimensions in international shipping for sustainability include location, resource, society, economy, environment, and ecology, as recommended in previous case studies [48,49]. The location and resource dimensions express the statues of regional resources following the resource-oriented principle. The life-cycle of door-to-door international shipping involves all the operational activities occurring in the entire door-to-door process. The retrospective and current status assessment of six dimensions determined needs to be conducted to understand the status and trends of the regional environment, including the social and economic environment, with value-focused [50] and precautionary principles. If the preliminary assessment results are compliant with the mandatory laws, regulations, norms, and standards, then the planning can proceed to the next step. Otherwise, the planning ends. The next step is to assess each activity in the door-to-door international shipping life-cycle and the interaction between activities of the door-to-door shipping and regional environments from the aforementioned six dimensions perspectives. The strategic decision-making can be carried out using the MDDM model, consulting with expert judgment. If the decision shows good results, the green strategic planning and continual improvement can be drawn up to push international shipping to be greener and greener towards sustainability. If the decision results are not satisfactory, the process should go back to data collection, change decision-making alternative(s), environmental dimension(s), or shipping operation, and redraw the planning step-by-step. This approach involves all related dimensions in the door-to-door shipping life-cycle and considers all available relevant parameters to ensure scientific feasibility and strategic decisionmaking reliability, applies the MDDM approach to the strategic decision-making process to overcome the inherent drawbacks of the multi-criteria decision-making (MCDM) approach [47] (see more discussion in Section 3.3.1.), and makes green strategic planning and continual improvement for greener door-to-door international shipping towards sustainability.

Multi-Dimensional Decision-Making (MDDM)
The MCDM approach, which includes the multiple-attributes and multiple-objectives decisionmaking approaches, has been widely used in business and sectoral public decision-making processes, but it is very difficult to apply to strategic decision-making processes, and especially to regional and non-structured strategic decision-making processes [47]. The MDDM approach was originally proposed to be used exclusively in strategic decision-making processes to address and overcome the inherent drawbacks in MCDM approaches, such as missing data, index selection, variable normalization, highly uncertainty and complexity, and weight assignment [47]. As a viable and effective tool for strategic planning against the background of a complex situation, MDDM can not only be used to frame the previous approach, but also to make a strategic decision by applying the MDDM model, (I, C; R), and expert judgments [47], where I represents impact, C is confidence degree of the I from expert judgments, and R indicates the relationship between the dimensions of regional environment and the alternatives [47]. In this model, experts scores (I, C, and R) are based on the assessment results and expert's experiences, where I is −3, −2, −1, 0, 1, 2, or 3, C is between 0 and 1 (0, This approach involves all related dimensions in the door-to-door shipping life-cycle and considers all available relevant parameters to ensure scientific feasibility and strategic decision-making reliability, applies the MDDM approach to the strategic decision-making process to overcome the inherent drawbacks of the multi-criteria decision-making (MCDM) approach [47] (see more discussion in Section 3.3.1), and makes green strategic planning and continual improvement for greener door-to-door international shipping towards sustainability.

Multi-Dimensional Decision-Making (MDDM)
The MCDM approach, which includes the multiple-attributes and multiple-objectives decision-making approaches, has been widely used in business and sectoral public decision-making processes, but it is very difficult to apply to strategic decision-making processes, and especially to regional and non-structured strategic decision-making processes [47]. The MDDM approach was originally proposed to be used exclusively in strategic decision-making processes to address and overcome the inherent drawbacks in MCDM approaches, such as missing data, index selection, variable normalization, highly uncertainty and complexity, and weight assignment [47]. As a viable and effective tool for strategic planning against the background of a complex situation, MDDM can not only be used to frame the previous approach, but also to make a strategic decision by applying the MDDM model, (I, C; R), and expert judgments [47], where I represents impact, C is confidence degree of the I from expert judgments, and R indicates the relationship between the dimensions of regional environment and the alternatives [47]. In this model, experts scores (I, C, and R) are based on the assessment results and expert's experiences, where I is −3, −2, −1, 0, 1, 2, or 3, C is between 0 and 1 (0, 1], and R is 0, 1, 2, or 3. The numbers (0, 1, 2, and 3) imply no, small, medium, and strong impact or relationship, respectively. The negative sign suggests an adverse impact [47]. Then, interactions between the operational activities and the regional environments can be calculated by [47,51]: (k = 1, 2, . . . , q; i = 1, 2, . . . , m; j = 1, 2, . . . , n) (1) where i is the operational activity, m is the total number of operational activities, j is the dimension of regional environments, n is the total number of environmental dimensions, k indicates the expert's serial number, and q is the total number of experts. S j i describes the impacts of operational activity i on the environmental dimension j, and S i j represents the impacts of environmental dimension j on the operational activity i.

3.3.2.
Life-Cycle Assessment (LCA) and "Continual Improvement" in ISO 14000 ISO 14000, which was issued by the International Standardization Organization (ISO, 2015), includes a set of voluntary standards for environmental management and enables industries to improve their environmental performance to boost their competitiveness and reputation [52,53]. This international standard has been considered an effective guideline for shipping sustainability, especially the Life-cycle Assessment (LCA) and Environmental Management System (EMS) [54][55][56].
The LCA emphasizes life cycle thinking [45], which is consistent with the need for an "entire shipment process" of door-to-door international shipping. Life-cycle thinking can help to understand seamless shipping operations [21] and trans-boundary effects [57]. In this study, the life-cycle of a door-to-door logistics supply chain for international shipping could be described as all operational activities between the supplying and receiving areas. These activities include the production and storage of cargo in the supplying areas and the sale, consumption, disposal, and recycling of cargo in the receiving areas following the LCA concept ( Figure 2). The current study focused only on general transport modes such as road transportation, rail transportation, inland waterway transportation, or marine transportation [58]. Moreover, possible LCA inventories and their indicators are summarized in Table 1.
Road/ rail/ inland waterway/ maritime transportation    On the other hand, the EMS highlights continual improvement, suggesting that "recurring activity could enhance performance" [46]. This concept is good for the dynamic process of green strategic planning for international shipping, moving gradually towards sustainability.

Assessment Methods
In order to evaluate the multi-dimensional environment, some assessment methods were selected, and are listed below: • Social assessment: Two techniques (i.e., public participation and expert judgment [48]) were chosen for social assessment to communicate with local people and share experts' experience using literature searches, questionnaires, interviews, and consultations; • Economic assessment: Methods such as cost-effective analysis, benefit-cost analysis, and life-cycle cost analysis, are suggested to support the economic decision-making for international shipping [59]. The cost is effective when benefits exceed costs. The total incremental benefits are compared with total incremental costs in benefit-cost analysis; • Environmental assessment: Environmental Impact Assessment (EIA) is a popular tool to take environmental issues into decision making process. It analyzes, predicts, and evaluates the possible environmental impacts of construction projects, and generates corresponding prevention and mitigation measures [60]. There is a set of EIA technical guidelines and standards developed by international organizations or each individual government [61]. The EIA also gives proper consideration from the social and economic aspects [61], but it only reaches the project level [62].
In contrast, the Strategic Environmental Assessment (SEA) is at the strategic level for, "the integration of environmental and social concerns in the process of developing policies, plans, or programs" [63,64]. Huang [65] proposed a theoretical framework of retrospective assessment approaches for SEA. In the transport sector, the European Commission enacted basic principles and key stages for SEA towards sustainability [66]; • Risk assessment: (1) The ISO 31000: risk management. This provides principles and guidelines as a general approach for risk assessment, which includes risk identification, risk analysis, and risk evaluation [67]; and (2) the ISO/IEC 31010: risk management. This recommends some useful techniques [68]. In addition, previous studies also recommended other methods for ecological and environmental risk assessment for strategic decision-making [49,51,69,70]; • Valuation: To integrate the interplay between shipping operational activities and multi-dimensional environment into decision-making processes, the Ecosystem Service Valuation (ESV) targeting the human welfare [71] is the most popular reference [72]. The values are generated by the prices from actual markets, surrogate market, and hypothetical market, including willingness-to-pay (WTP) [73][74][75][76]. It is beneficial for valuation of the impacts on location, resource, and society because of their socio-economic attributes and human subjective values [36]. However, as to the concept of green strategic planning in international shipping following eco-centrism and green development [2], the natural ecosystem has values in and for itself, irrespective of its utility for human beings [8]. Therefore, the concepts and methods of ESV are not good for valuation of the natural ecosystem. The concepts and methods of Ecosystem Intrinsic Valuation (EIV) have to be used in strategic decision-making processes for the evaluation of EIV [8,36,39]. Zhang et al. [36] and Sheng et al. [37] developed and applied the EIV in decision-making processes and made much progress. Thus, the EIV method is recommended to evaluate the impacts of environmental and ecological dimensions. Table 2 summarizes a set of potential methods for international shipping green strategic planning. The proposed approach and methods follow the trend of door-to-door international shipping development, targeting green development, with beliefs of non-anthropocentrism and eco-centrism, and move gradually and continuously towards long-term sustainability. Table 2. Summary of the suggested green strategic planning methods for international shipping.

Methods Descriptions Applications
Decision-making MDDM and its model of (I, C; R) A stepwise approach for strategic decision-making process To provide a multi-dimensional approach and a model for strategic decision-making processes in uncertain and complex environments

Overview
Due to the growing deployment of larger vessels, the containerized trades allow the door-to-door supply chain construction in the shipping sector [23] and, hence, their impact on the environment can be separated. In view of this fact, this case study focused on a Chinese company importing wines from Italy to examine the approach and methods of green strategic planning designed for door-to-door international shipping. Specifically, CIELO E TERRA S.p.A. (a Joint Stock Company called "CIELO"), located in Montorso Vicentino, Vicenza, Veneto, Italy, exports wines to Xiamen Taila Import and Export Company Limited (called "TAILA"), located in Xiamen City, Fujian Province, China. The life-cycle of the door-to-door international shipping took place from 31 October 2016, to 20 December 2016, which included road transportation from CIELO to Port of Venice, marine transportation from Port of Venice via Port of Piraeus to Port of Xiamen, and road transportation from Port of Xiamen to TAILA. To implement the LCA approach from cradle-to-grave, we extended the process to front-end oriented vine planting and wine production, and back-end oriented wine sales, consumption, and waste disposal.

•
Vine planting and wines production and storage: In this case study, grapes were planted in organic vineyards in Veneto and processed following the wine production procedures: harvesting and picking up → destemming and crushing → alcoholic and malolactic fermentation → aging (low-end wines are not required) → filtration → bottling → storage (aging in the bottles) → labeling → checking and testing → packing. During fermentation, high-end wines in oak barrels and low-end wines in stainless steel barrels were stored in a semi-finished area. The bottled aging wines were stored in the warehouse, and the packed wines were placed in a finished area; • Storage and sale of wine in the TAILA, and disposal of waste: The packed wines were stacked in the warehouse of TAILA for about one year for Casaletto wine before a sale, and two to three years for Ripasso wines. The ratio of retail price to wholesale price was approximately 3:1. The Casaletto was sold for RMB ¥38 (Chinese yuan) at wholesale price and RMB ¥98 by retail, while Ripasso was sold for RMB ¥100 at wholesale price and RMB ¥400 by retail. None of the bottles were recycled.

Data Collection
The data collection methods were mentioned in Section 2.2, and the data sources are listed in Appendix A Table A1. For the trend analysis of the multi-dimensional assessment conducted in this study, the year of 2015 was taken as the baseline year for current situation assessment and the year of 2010 was used as the baseline year for retrospective assessment.

Assessment
The indicators used for regional multi-dimensional environmental assessment are listed in Table 3. They can be modified depending on a specific case.

Regional Environment Retrospective and Current Status Assessment
To understand the trends of regional environmental status and variation in the passing areas in the logistics flow, the current status and retrospective assessment of the regional environment are very useful for the identification and evaluation of environmental (accumulative) impacts and variation [65].
The results of the current status and retrospective assessment are summarized in Supplementary Materials I. Most of the dimensions in relevant regions showed good situations based on their assessment results. However, the results also indicate that Veneto is limited to natural resources, especially with respect to water and energy [78,79], the Port of Venice is still confronted by some ecological problems associated with large benthic invertebrates and aquatic plants [80], and the Port of Xiamen has low biodiversity in phytoplankton and zooplankton and shows conflicts between port activities and natural reserves [81,82]. Nevertheless, there are no problem in the open oceans, although there may be some environmental problems in coastal waters, such as eutrophication.

Life-Cycle Assessment
Based on the life-cycle inventory of door-to-door international shipping (Table 1), we also tried to describe and assess the interaction between the operations of door-to-door shipping and six-dimensional environments related to logistics flow in the areas passed by. The detailed results are illustrated in Supplementary Materials II. Most of the results show that international shipping activities have positive impacts on the dimensions of society and economy, but negative impacts on resources, environment, and ecology. Employment and cost-benefit were identified as the main factors of social and economic concerns and, in the meantime, threatened natural reserves. Some sensitive areas require certain considerations.
On the other hand, the limited natural resources in Veneto will negatively impact the grape cultivation and production slightly, but rich renewable energy [79] plays an active role. The Venetian Lagoon, a United Nations Educational, Scientific and Cultural Organization (UNESCO) World Heritage site, seeks natural conservation, which is a challenge to the shipping activities in the Port of Venice. The natural reserves for endangered species, including Chinese white dolphin and Egrets, also limited shipping activities at the Port of Xiamen [82]. Table 3. Multi-dimensional indicators for the regional environmental assessment.

Sub-Categories Indicators
Location (advantages and disadvantages compared with the surrounding region) Natural and Geographical Geography, topography, landform, geology, climate, hydrology, soil, and groundwater, etc.

Resource location
Resource structure and resource sensitivity.
Social location History, culture, and policy. Economic location Regional industries, markets, and economic hinterlands.
Ecological location Ecological structure, function, and process.

Resources
Natural resources Land, water, forest, energy, biological resources, including rare or endangered animals and plants.
Humanistic resources Culture, labor resources, transportation, and tourism resources.

Society
Political civilization Policies, regulations, religion, ethics, social activities, public participation, and social security.
Family and household Population, proportion of migrants, labor, employment, income, consumption, prices, and living environment.
Culture and art Cultural lifestyle, language, traditional culture, humanities, and art.
News and communications Information disclosure, media development, news topics, communication effects.
Medical and health Medical facilities, health conditions, diseases.
Education and technology Education investment, education resources, investment and output in research and development.
Administrative management Management system and performance.

Infrastructure
Infrastructures of transportation, business, entertainment and leisure, information and communication, and landscaping.

Economy
Economic power GDP (gross domestic product), GDP growth rate, GDP per capita, industrial output value, industrial output growth rate.
Industrial structure The output of the first, second, and third industries and their proportion, foreign investment, outbound investment, transportation business, and environmental investment.
Fixed asset investment Total fixed assets investment, new fixed assets investment, and fixed assets investment in transportation.
Trade and logistics Total import and export volume, freight volume or throughput, and freight turnover.
Finance and taxation Financial revenue, fiscal deficit, and taxes.
Monetary and insurance Deposit and loan, capital flow, insurance amount, indemnity, and solvency.

Environment
Air environment Air quality, and atmospheric diffusion conditions.
Water environment Surface water, seawater, and groundwater quality, and hydrodynamic conditions.
Acoustic environment Equivalent sound level, over-standard rate.
Solid waste Sources, quantity, and solid waste management and disposal.
Soil environment Soil quality.
Environmental risk Environmental risk, which may be caused by oil spills or chemical leakage.

Ecology
Terrestrial ecosystems Ecosystem health, biodiversity, habitat environment, vegetation cover, and species invasion.
Aquatic ecosystems Ecosystem health, biodiversity, habitat environment, species invasion.
Sensitive bio-ecology Statutory protected species, nature reserves, rare or endangered animals and plants, and endemic flora and fauna.
Ecological risk Ecological risk, which may be caused by oil spills or species invasion

Process of Strategic Decision-Making
Based on the assessment results, strategic decisions were made by the experts' judgments using the MDDM model (I, C; R), following the four steps given in the MDDM approach [47]: (1) Integrated assessment of the status for each dimension in each region: The scores of six dimensions of each region were made according to the experts' judgments, based on the results of retrospective and current status assessment, to understand the regional situations. Numbers 1, 2, and 3 were used to represent the integrated status of poor, medium, and good, respectively, as the indicators for sub-categories or dimensions in each region. Five experts (listed in Appendix A Table A2) were invited to participate in the integrated assessment during the decision-making processes; (2) Impact assessment for LCA: The scores of the impacts of shipping activities in the life-cycle on the six dimensions of regional environments and the impacts of six regional dimensions on shipping activities were made based on the experts' judgments, according to the results of status evaluation and experts' experiences, following the approach and methods discussed in Section 3.2; (3) Strategic decision-making: The interplay and relationships between shipping activities and the six dimensions of regional environments were made based on the experts' judgments using the MDDM model (I, C; R) following the approach and methods in Section 3.2. The comprehensive evaluation values S j i and S i j were calculated using Equation (1) and Equation (2). The results are given in Tables 4 and 5, which were generated based on all the experts' judgments and used for the door-to-door international shipping final decision-making; (4) Greening development assessment: The green development levels in shipping activities and all dimensions of relevant regions were evaluated using values of 1, 2, and 3 to represent low, medium and high development levels, respectively [2], aligned with the ecosystem intrinsic value for maintenance and nature conservation [37].

Result and Strategic Decision-Making Analysis
Results from the strategic decision-making analysis show that the confidence levels varied, mostly ranging from 0.6 to 1, with an average of 0.77 (Table 4) and 0.74 (Table 5), respectively, which were very close to each other among the five experts, with a high confidence level.
As for the shipping activity impact on the relevant regional environment (Table 4), the positive and negative judgments were relatively consistent, and the Relationship scores given by the experts agreed very well. The average comprehensive evaluation scores (I × C × R) varied between -1.8 and 4.2. Regarding the impacts of relevant regional environments on shipping activities (Table 5), some experts gave different opinions on the positive and negative impacts and relationships. The average scores ranged from −4.5 to 7.2, indicating a relatively wider variation than that in Table 4. Nevertheless, the final decision was made by a majority vote among the experts.
According to the experts' judgments, we could rank the impact based on the absolute value of the comprehensive evaluation scores. The impact levels could be defined as slight, low, moderate, and significant when the scores were <1, 1-3, 3-6, and > 6, respectively. Accordingly, the shipping activities showed slightly positive impacts on the dimensions of society and economy, and slightly negative impacts on the dimensions of resources, environment, and ecology, except for the wine production and storage in the CIELO factory, which showed a slightly positive impact (Table 4). As shown in Table 5, the dimensions of location, resources, society, and economy positively affected the shipping activities in most situations, but the dimensions of environment and ecology showed a slightly negative impact on the shipping activities. The activities of wine production, storage in the CIELO factory, and maritime transportation suffered from a slight positive impact. Table 4. Results of experts' judgments on the shipping activity impacts on relevant regional environments using the multi-dimensional decision-making (MDDM) model.

Regional Environments Expert 1 Expert 2 Expert 3 Expert 4 Expert 5 Average Scores
Wine production    Table 5. Results of experts' judgments on the relevant regional environmental impact on shipping activities using the MDDM model.

Regional Environments Expert 1 Expert 2 Expert 3 Expert 4 Expert 5 Average Scores
Wine production  Table 5. Cont. The assessment results of the green development level are shown in Table 6. Due to the large space, the results of the green evaluation of the environmental dimension are not listed. Most of the green development levels of shipping operations evaluated by the experts were the same, with a few exceptions. Therefore, we had reliable and effective expert judgments with good consistency. The green development levels of each shipping activity were all in the middle or upper level, of which wine production and operation in Port of Piraeus were at the highest level, while sale, consumption, and disposal of wine products were at the lowest level. Table 6. Results of judgments by experts on the green development levels of shipping activities (extending to grape planting, wine production, consumption, and waste disposal).

International Shipping
The green strategic planning for the door-to-door international shipping of CIELO wines can be organized as below: • Vision: Follow the development trend of international shipping and meet the need of sustainability; • Goal: Ensure that all activities in the door-to-door international shipping life-cycle satisfy the requirements of green development; • Contents: Continually improve all activities in the life-cycle of door-to-door international shipping to approach green development; • Planning: (1) Define the life-cycle of the door-to-door international shipping of wines from CIELO to TAILA, as discussed in Section 4.1; (2) Assess the interactions between operational activities of the door-to-door international shipping and regional environment from a multi-dimensional perspective; Identify the green development level of the activities and the regional environment; and (4) Request to continually improve all activities of door-to-door international shipping to reduce the negative impacts on all dimensions of the regional environment, to achieve green development.
Based on the strategic decision-making results, we can propose to measure continual improvement of CIELO wine international shipping activities to reduce the negative impacts on the regional environment and raise their green development levels, in this case, to move towards sustainability. Recommendations for continual improvement are given in Table 7, which will help the next operation cycle.

Activities Continual Improvements
Vine planting Continually working on organic viticulture.

Wine production
Continually reducing energy consumption, increasing clean energy usage, reducing environmental impacts, and maintaining the industry-leading levels.
Storage in CIELO's factory Inventory optimization and land resource consumption reduction.
Road transportation from CIELO to Port of Venice Continually increasing energy efficiency, reducing exhaust emissions and traffic noise, and avoiding the impacts on birds' habitats and animal corridors.

Operations in Port of Venice
Continually increasing the energy efficiency and clean energy usage, reducing exhaust emissions and conflicts to sensitive ecology, and preventing the risks of an oil spill and species invasion.

Operations in Port of Piraeus
Continually optimizing the container scheduling, restricting the docking of old ships, reducing the exhaust emissions and noise, and preventing the risks of an oil spill and species invasion.

Maritime transportation
Using new ships, continually increasing the ships energy efficiency, reducing the exhaust emissions, prohibiting garbage entering the sea, and reducing the conflicts to sensitive ecology.

Operations in Port of Xiamen
Continually increasing the energy efficiency and clean energy usage, reducing exhaust emissions and noise, avoiding conflicts to sensitive species, and preventing the risks of an oil spill and species invasion.
Road transportation from Port of Xiamen to TAILA Continually increasing energy efficiency, reducing exhaust emissions and noise, and avoiding interfering with the ecological sensitive areas.
Storage in TAILA's warehouse Reasonably arranging sales, and reducing the occupation of land resources.
Sale, consumption, and disposal of wines Recycling the wine bottles.

For the Regional Environment
Because the regional environment showed a direct impact on international shipping green development, we offer suggestions on continual improvement and green strategic planning for the regional environment to promote regional green development that will benefit international shipping. These include: (1) identifying the issues related to the regional environment and their impacts on international shipping based on the assessment (Section 4.3.1) and results of strategic decision-making (Section 4.4); (2) proposing measurements of continual improvement for regional environment from a multi-dimensional perspective; and (3) promoting regional green development to benefit international shipping. These recommendations are listed in Table 8, which will be used in the next case study.

Discussion of the Case Study
It was found from the case study results that the proposed approach and methods for the international shipping green strategic planning have several advantages: (1) they are applicable to door-to-door international shipping, can be used to evaluate the whole life-cycle of the logistics supply chain, and meet the development trend of the shipping industry; (2) they abide by the nature-centered principle and ecosystem intrinsic value [2] to follow green development and guide shipping towards sustainability; (3) they apply the MDDM approach for strategic decision-making to overcome the inherent weakness in MCDM, and push shipping development towards the long-term goal of sustainability; (4) they apply life-cycle thinking and continual improvement in ISO 14000 to meet the needs of the door-to-door logistics and green development; and (5) the planning process is at the strategic level by translating the long-term green development goal into development strategies, rather than passively responding to specific environmental problems. Table 8. Continual improvement recommendations for regional environment.

Regions
Continual Improvements

Veneto City
Continually reducing traffic congestion, improving the ambient air quality and acoustic environment, avoiding interfering with the sensitive ecology, and preventing risks and disasters.

Port of Venice
Continually reducing the emissions of NO X (nitrogen oxide), PM(particulate matter), polycyclic aromatic hydrocarbons and inorganic nitrogen, avoiding oxygen-poor, increasing the port waste collection, reducing the impacts on special flora and fauna in the Venetian lagoon, and preventing the risks of an oil spill and species invasion.

Port of Piraeus
Continually improving the ambient air quality, strengthening the port waste management, avoiding the conflicts between shipping and sensitive ecology and maritime archaeological sites, and preventing the risks of an oil spill and species invasion.

Port of Xiamen
Continually reducing the emissions of carbon, PM10, and traffic noise, and the nutrient levels in waters, protecting the biodiversity, avoiding conflicts between shipping and sensitive organisms, and preventing the risks of an oil spill and species invasion.
Xiamen City Continually improving the ambient air quality and acoustic environment, avoiding interference with sensitive ecology, and preventing potential risks and disasters.
By applying the proposed approach and methods to this case study, it has not only indicated common environmental problems, such as energy efficiency, emissions, noise, ship oil spills, and endangered species, but also identifies the issues associated with shoreline and land resource uses, biodiversity loss, risks of species invasion, natural disasters and accidents, saltwater intrusion, and clean energy consumption, which are all green development key issues that are easily ignored.

Discussion
The framework and methodology for green strategic planning of door-to-door international shipping have made much progress, such as: (1) for the first time, it drafted a plan for door-to-door international shipping; (2) it integrated green development and its principles into the planning of international shipping after defining the concept of green development; (3) it applied the MDDM strategic decision-making approach to the international shipping strategic planning to reach the long-term goal of sustainability, rather than passive and fragmented environmental management; and (4) it combined life-cycle thinking with continual improvement in ISO 14000 for the first time, to meet the needs of the door-to-door logistics and dynamic green development processes, respectively.
The connotations of the proposed approach and methods for green strategic planning include insisting on a nature-first principle, adapting to door-to-door changing, using a top-down strategic decision-making approach, applying holistic methods for assessment, and integrating ISO 14000 concepts and methods into strategic planning.
However, big data acquisition and experts' judgments remain some challenges. Application of technologies such as the Internet of Things [83] and big data analysis may assist in international shipping green strategic planning. Furthermore, the application of ecosystem intrinsic value may still encounter some difficulties [37].

Conclusions
International shipping has been transformed from port-to-port operations to door-to-door services in the current context of globalization, larger-sized ships, and technological development. The world's shipping communities recently made their commitments to sustainability and were becoming more concerned with the implementation of the UN's SDGs. The approach and methods proposed in this study for door-to-door international shipping green strategic planning: (1) adapt to the development trend of the shipping industry of door-to-door international shipping services in the context of globalization; (2) follow the green development concept to reach sustainability; and (3) use strategic decision-making for shipping development, aiming at the long-term goal of sustainability. Through the case study, we acknowledged that the proposed approach and methods for door-to-door international shipping green strategic planning are suitable for the life-cycle in the logistics supply chain. This application not only indicated common environmental problems but identified the issues with green development to promote shipping development towards the long-term goal of sustainability.
Key barriers still exist in data accessibility and expert participation. Advanced technologies, such as big data, the Internet of Things, and Blockchain, are still needed to help data acquisition and build a collaborative and operative research-practice network in future. The proposed systematic approach and methods can be improved in the future for a broad application to other industries.

Acknowledgments:
We are grateful to three anonymous reviewers whose informative comments and suggestions improved an early version of this manuscript.

Conflicts of Interest:
The authors declare no conflict of interest. Table A1. Selected data sources for the case study.

Interview and survey
The TAILA company and the road transportation in Xiamen were visited to understand the current situation of storage and sales of wines in TAILA and road transportation in Xiamen region, and the Xiamen Port Authority was interviewed to help understand the operations in Port of Xiamen.

Literature search
The keywords of "Veneto", "Port of Venice", "Port of Piraeus", "Port of Xiamen", and "Xiamen" were used to search for information from databases for understanding their current status.  Table A2. List of the invited experts who participated in the case study.

Experts Details
Expert A Shengyun Yang, retired professor, the College of Ocean and Earth Sciences, Xiamen University, whose background is in integrated coastal management and ecosystem-based marine management.
Expert B Luoping Zhang, retired professor, the Coastal and Ocean Management Institute, Xiamen University, whose background is in environmental management.
Expert C Weiqi Chen, retired professor, the College of the Environment and Ecology, Xiamen University, whose background is in resource and environmental economics.
Expert D Qinhua Fang, professor, the Coastal and Ocean Management Institute, Xiamen University, whose background is in environmental system assessment, marine spatial planning, and marine policy.

Expert E
Yangfan Li, professor, the College of the Environment and Ecology, Xiamen University, whose background is in coastal landscape ecology, ecological environment planning and ecological civilization.