【正文】
and ERP MRP不安定性之減少方法 2 ? 固定計(jì)畫訂單 (firm planned order, FPO) ? 當(dāng)某計(jì)畫訂單發(fā)出 (POR)被定義為 固定計(jì)畫訂單 時(shí) (FPO) ,它的 數(shù)量 和 期別 將 涷結(jié) 不允許電腦自動(dòng)改變它的內(nèi)容。 ?「封閉式」 意含除上述功能外 , 並包括執(zhí)行後的 回饋 , 以能 持續(xù)確保規(guī)劃的正確性 。其訂購批量與時(shí)程如下表: 總成本 = 200*3 + 2*(40+70+30+55) = 600 + 390 = 990 1974/1404 ? 1 2 3 4 5 6 7 8 9 10 淨(jìng)需求 0 30 40 0 10 40 30 0 30 55 期末存貨 0 40 0 0 70 30 0 0 55 0 訂購數(shù)量 70 80 85 44 MRP and ERP MRP中的批量決策法 (續(xù) ) 5. 零件期間法 (partperiod balancing,PPB) ? 其目標(biāo)乃是 平衡 準(zhǔn)備成本 與 持有成本 。 ? 資料處理效率相對(duì)較高。 ? 市場(chǎng)及需求較穩(wěn)定 之狀況。 ? 可直接處理主生產(chǎn)日程計(jì)畫的變更。 ? 產(chǎn)業(yè)競(jìng)爭激烈,交貨期短的生產(chǎn)作業(yè)。 MRPII乃是計(jì)畫與控制一個(gè)製造廠商的所有資源 (如 生產(chǎn)、行銷、財(cái)務(wù)與工程等部門 )以發(fā)揮企業(yè)總體經(jīng)營效益的一個(gè)過程 。 52 MRP and ERP 市場(chǎng)需求 生產(chǎn)計(jì)畫 問題 ? 粗估產(chǎn)能計(jì)畫 Yes No Yes No 財(cái)務(wù) 行銷 製造 調(diào)整生產(chǎn)計(jì)畫 製造日程 安排總表 MRP 能量需求規(guī)劃 問 題 需求日程 表 調(diào)整生產(chǎn)計(jì)畫 MRPII 53 MRP and ERP Example — ERP at Cybex1 ? Ships more than 200 different products to 150 dealers and thousands of customers around the world. ? Past: three factories were run by different software systems ? Today: integrated with PeopleSoft’s ERP software 54 MRP and ERP Example — ERP at Cybex2 ? Customer order triggers a series of events internally: ? Financial system performs a credit check ? Order management system sends an order to the manufacturing plant for custombuilt items and to the warehouse for instock items ? Manufacturing responds with an availabletopromise date and customers are notified of estimated delivery times 55 MRP and ERP Example — ERP at Cybex3 ? Customer order triggers a series of events internally: ? Removing an item from stock triggers a purchase requisition for replacement stock ? A shipment triggers an invoice and online tracking through the customer’s preferred carried ? Event management system notifies dealers, customers, and sales reps when items are shipped or when scheduled shipping dates change 56 MRP and ERP Enterprise Resource Planning (ERP) ?Organizes and manages a pany’s business processes by sharing information across functional areas ?Connects with supplychain and customer management applications 57 MRP and ERP ERP Modules 58 MRP and ERP ERP modules — finance and accounting module ? Financial accounting ? Investment management ? Cost control ? Treasury management ? Asset management ? Enterprise controlling… 59 MRP and ERP ERP modules — sales and marketing module ? Order processing ? Product configuration ? Delivery quotations 60 MRP and ERP ERP modules — production and materials management module ? Handle all types of manufacturing processes – maketoorder, assembletoorder, repetitive, and continuous ? CAD programs ? Performs process planning ? billofmaterial processing ? Product costing ? Processes engineering change orders ? Plans material requirements ? Allocates resources ? Schedules ? Monitors production 61 MRP and ERP ERP modules — human resources module ? Workforce planning ? Employee scheduling ? Training and development ? Payroll and benefits ? Travel exp