隨著工業社會的蓬勃發展，化石燃料被廣泛地開採與運用，過度的使用以及燃燒煤炭與石油而產生的二氧化碳和其他溫室氣體，大量堆積在大氣層中，而形成溫室效應。大氣中的溫室氣體含量一旦過高，將攔截過多的地球輻射，使得地表氣溫逐漸上升，造成諸多環境問題。因此各國政府正著手進行各項減碳計畫，而電動車產業正是各國以及汽車製造產業目前正在研發以及推動之要點。
共享經濟的概念目前正在全世界逐漸發展，此概念結合了許多不同領域之產業，而車輛共享計劃也在此概念下誕生。隨著電動車逐漸發展完備，以及電池技術的改良，電動車的行駛距離以及充電模式已經能夠符合大眾之需求，共享概念以及電動車之結合正是節能減碳以及解決車輛數過多的一大良策。由於電動車共享系統仍屬新創之產業，其實際營運模式以及營運之規模(例如：充電站站數、車輛規模等)仍為未定數，因此業者在初期的投資評估上尚有困難。
有鑑於此，本研究欲針對電動車共享系統建構一模擬模式，利用Arena軟體模擬電動車共享系統之實際營運模式，考量所有可能會在系統中所出現之情況，利用模擬模式實際呈現，幫助業者了解系統如何運行。並建立三種不同的投資情境，包含投資成本最小化、收入最大化以及利潤最大化，利用本研究所建立之最適車隊規模產生模式，反覆評估以及計算，並求得此三種情境之最適車隊規模。本研究藉由拆解電動車共享系統之成本結構，計算各種投資規模之成本、利潤以及損益平衡時間，以作為業者在進行電動車共享系統之投資時，制定最終投資決策之依據。

There are growing concerns on traffic congestion, climate change and parking problems in major cities. Faced with these concerns, policy makers have sought sustainable transportation options including electric vehicle sharing programs. The combination of the sharing concept and electric vehicles could reduce carbon dioxide emissions and vehicle congestion in cities. Carsharing is growing rapidly in popularity, often backed by government and private partners, such as universities and developers. Carsharing has lower fixed costs and higher variable costs than private vehicle ownership, making occasional use of a vehicle affordable. Since the electric car sharing system is at its early stage, its actual operating mode and the scale are still uncertain, so the initial investment assessment is difficult for investors.
In light of the challenges ahead, this research constructs an algorithm that generates the optimal fleet size of an electric car sharing system including the number of electric vehicles and charging piles. To simulate the actual circumstances, this study constructs a model with actual data for the electric vehicle sharing system by using Arena 14.0. The study establishes three investment scenarios: the minimization of investment costs, the maximization of income and profits, searching the best solution of each scenario. The feasible fleet size of each scenario which is generated by the algorithm could be used as the recommendations for making the final investment decision.

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網路資料來源
行政院公報資訊網
https://strategyzer.com/
http://onlinelibrary.wiley.com/doi/10.1111/j.1530-2415.2003.00015.x/full
http://opinion.udn.com/opinion/story/7885/1068765