在台灣塑膠射出製造業市場，受限於國內消費人口，市場規模發展的侷限，且伴隨著原油價格的攀升，接連帶動塑膠原料價格的飆漲，加上品牌大廠對專業代工與設計業者的價格控制等因素影響下，競爭情勢逐年倍增。現行接單式生產的個案公司在設備產能有限的狀況下，為了有效提升企業獲利，不得不顧及生產設備產能所對應訂單需求的滿足，因此同時採用成本加成定價法以及競爭導向定價法雙管齊下分別爭取不同產品訂單，以避免訂單量不足所帶來的衝擊。但是，不同的定價方法對獲利的貢獻也有極大的差異，現行競爭導向定價法接獲之訂單所能爭取的利潤遠不及成本加成訂價法接獲之訂單，加上傳統直覺化的經營管理模式下，未能對接單配比做出適時的掌控與調整，故本研究藉由限制理論所提嚴謹的因果邏輯關係的運用，針對生產設備產能限制予以最有效的發揮，以期能提升企業的獲利，並借重系統動力學以本研究議題作為系統，進行系統性思考其中變數如何互相影響，建構出包含系統性動態複雜且具有回饋影響的回饋式結構，其內含數學的分析方法，能快速且正確反應出系統結構上不同產品的接單數量對企業獲利的影響程度，進而模擬設計出具利基的接單策略，在有限的設備產能下，有效靈活調配不同產品的接單比例，極盡所能的發揮不同定價策略所具備之爭取訂單優勢以及獲取高利潤的貢獻，另一方面，透過模型針對具有改善空間的生產參數進行模擬，進而找到改善獲利的方向，以帶動提升企業整體的獲利。

Plastic injection manufacturing in Taiwan is constantly facing fierce price competition. In order to avoid higher unit costs, this case company strives for product orders in a comprehensive pricing model to meet the demand for orders. However, due to poor management, it has caused loss in sales revenue. The purpose of this study is to find a better strategy for receiving orders to increase sales revenues for corporations.

This study uses semi-structured interviews to collect relevant company operational data. It systematically uses system dynamics to analyze how the variables affect each other in order to construct a feedback structure that includes systematic dynamics and has complex and feedback impacts. With the limited capacity for equipment production, the study adjusts the proportion of orders for different products in order to simulate a profitable order-taking strategy. By simulating a profitable order-taking strategy, more profits of the case company will be enhanced.

This study focuses on the relatively high profitable products and analyzes three key factors: production cycle time, product unit weight, and predetermined profit ratio. When the production cycle time is down by 2sec and the unit weight is down from 53.5g to 50.5g, the maximum gross sales profit can be guaranteed. In addition, when the proportion of scheduled profits is up from 0.15 to 0.18, the overall gross profit is up by 22.6%.

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