Analyzing the Factors of Inactive WIP Stocks by Using Date Mining Technique - A Case Study of Synthetic Leather Company

[[abstract]]對於企業的經營而言，存貨是有其必要性的，管理者根據銷售和生產計劃，計算成品、半成品、原料等所需，考慮生產和運輸等因素，在生產作業不斷料的前提之下，減少原物料的庫存量。有存貨即會有呆滯，「呆滯」的定義依企業不同，而有差異，一般指在規定的期間內沒有異動，或異動數量小於規定的百分比之內，但其規定的期間，必需在物質本身變質的有效期間內。本研究以庫存期間超過六個月以上，即判定為呆滯半成品。 呆滯的產生原因，通常不是由單一的原因所造成的。因本研究個案半成品庫存管理，皆以人工方式，定期檢視管理，故對於呆滯本成品只能做事後的處理。本研究除了以資料庫半成品庫存帳齡表為基準，搭配其他資料來源，如一般會發生呆滯的原因，和產品在生產過程中有相關的生產條件，期許透過資料探勘的方式，找出隱藏在資料庫中，難以分析的呆滯半成品形成原因，再經由決策樹的技術優勢，將不同呆滯半成品成因之間的關係，進行分析，找出造成半成品呆滯的因素，最後可得到「產量」、「製程」、「超量完工」三個因素，期許藉由本研究得到之結果，可提供給管理人員，一個簡單且清楚的決策方向，不需依賴過去以往的經驗值來判斷決策，藉此改善半成品呆滯問題，期望能在滿足個戶交期需求之同時，也能降低半成品庫存，減少半成品呆滯發生之風險。[[abstract]]The inventory is necessary for the business According to sales manager and production planning calculation of products raw material needed to consider factors such as production and transport in production operations continue to feed the premise of reducing inventories How to definition of inaction WIP stocks different enterprises In general refers to no change in the period or transaction is less than percentage The period must be within the effective period of the material itself The purpose of the study inactive WIP stocks period is over six month The factors of inactive WIP stocks are usually not caused by a single factor The inventory management of WIP stocks is managed by manual in the case For the inactive WIP stocks can only be done after the deal In addition to using database inventory aging data sources and match the other data sources such as the causes of the factor of inactive WIP stocks Conditions related products in the production process Through the method of data mining find out the factors of the inactive WIP stocks hidden in the database Use data mining technique decision tree It will analysis the relationship between the different factors of inactive WIP stocks to identify the factors causing inactive WIP stocks Finally we cans get three factors 「production quantity」 「process」and 「over-completion」 It is hope that the results of this study will provide managers with a simple and clear decision-making direction It does not rely no past experience to judge decision-making WIP stocks to improve the inactive problems We expect to meet customer delivery but also can be reduce the inventory of WIP stocks Reduce the risk of inactive WIP stock