黃金在通訊頻率元件產業上是不可或缺的重要材料，在應用上它提供了較其它金屬材料更穩定的訊號傳遞與高水準的抗干擾表現，使產品能提供不超過1PPM的頻率震動。雖然黃金有如此優秀的功能水準，但在存貨策略上卻是令企業頭疼的挑戰。 黃金屬於貴金屬材料，由於材料本身的價格不低且隨時間呈隨機的波動，加上買賣雙方採用現金交易制且無數量折扣等特性，促使衍生的存貨成本相對高昂。黃金成本主要的產生來源是資金的積壓，一般企業為避免缺料所產生的成本，多備有安全庫存以為緩衝，當國際金價大幅上昂時，安全庫存成了資金積壓的主要來源。 本研究採(訂購點，訂購量：R，Q)模型構建。在求取最佳訂購點部份是由(Reorder Point：ROP)模型延伸而來，利用6週移動平均預估下期黃金平均使用量與安全庫存計算ROP來控制黃金庫存量。在訂購量上則是依照黃金特定的購買量限制選擇大於ROP的最小黃金允許購買量。為配合移動平均法的計算，在每次庫存量低於ROP進行補貨程序時，此（R，Q）模型需重新計算，以擷取最貼近趨勢的新資料。 本(R，Q)模型構建完成後，藉由績效指標與現況、ROP、定期訂購等三種模型計算結果進行比較，以驗證本(R，Q)模型的有效性與其效益。 中小企業由於資源有限，又缺乏對顧客端的議價能力，當原物料價格上升時會對營運造成一定壓力。本研究構建目的期望能在不降低服務水準的前提下能有效降低黃金庫存，減少資金積壓的成本以增加企業競爭力。 Gold is one of the important raw materials in the communication frequency industry. It provides more stable signal and high anti-noise characteristics than other common materials in application and its frequency shift can be controlled within 1PPM, but the big challenge is at its stock strategy. Gold is a noble metal with some special merits. The unit price of gold is high, randomly floating with time, cash exchangeable, and no quantity discount. Those features make stock cost high. The major source of the cost comes from capital in warehouse. Usually, corporation will set up safety stock (S.S) as buffer to prevent material shortage. The S.S will be a major contributor of capital when the raw material price raising. This research to set up a (R, Q) model to solve high inventory cost problem. The R model is to refine the parameters from general ROP model (Reorder Point Model). To use 6weeks moving average method to look for average utility volume and standard deviation to get S.S and ROP for the inventory control. The Q model is to purchase minimum sales volume, which is larger than reorder point. This (R, Q) model has to renew while inventory is equal or less than the reorder point. To calculate performance indicator and compare with each other for current practice, ROP model, regular order system and (Q, R) model to verify the effectiveness and benefit. The purpose of this research would like to reduce the inventory, so as to effectively save the cost of capital inventory without the sacrifice of service level, thus competitiveness is enhanced.
