本研究探討多種產品在金屬模具壓製生產過程中,僅需經過單一加工程序,卻有多台非相關平行機台可供選擇使用時產生的排程問題。此類問題屬於單階平行機台問題。善加運用基礎之派工法則可快速解決工廠現場排程之問題,達到現場管理快速回應之機制,對企業而言,當生產因素變更時能迅速對應問題點,縮短應變時間,提高人員與機台使用率,提昇企業整體績效,本研究運用EDD、SPT、CR、MST四種基礎派工法則進行產品與機台排程之研究分析,結果顯示在產品組合變化大的情況下,EDD派工法則能使總延遲時間最小化;MST次之;SPT可使總完工時間最小化;CR會產生較大遲交成本;產能與訂單需求方面,在訂單產品需求總數不變情況下,進行訂單切割,成為小批量生產與訂單交期均勻分散於排程時間內可求得滿意的近似解,使訂單總完工時間與訂單總延遲時間最小化。
This research probes into the scheduling issues that occur in the process of producing various products by compressing with metal molds, especially when only one single process procedure is required but many unrelated parallel machines are available. These issues are categorized as the single parallel machine scheduling problems, which can easily be solved by using dispatching rules well to achieve fast response in field management. In this way, when changes in production factors emerge, fast response can be attained, the response time can be significantly cut down, the utilization ratio of staff and machines can be raised, and the overall performance of enterprises can be improved. This research employs four basic dispatching rules, namely EDD、SPT、CR and MST, to analyze the scheduling, and the results show that when great diversity is found in product mix, EDD works best in minimizing the total tardiness, followed by MST, while SPT works best in minimizing the makespan, and CR leads to bigger delay cost. As for production capacity and order demand, EDD can get the approximate solution and minimize the total makespan and total tardiness by order splitting and proper arrangement of ship time without changing the total product quantities for the orders.