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【正文】 s. Contains forecasts only. Time Fences ? Demand Time Fence (DTF) ? Planning Time Fence (PTF) ? Frozen (Inside DTF) ?No schedule changes allowed within this window ? Moderately Firm (Between DTF PTF) ?Specific changes allowed within product groups as long as parts are available ? Flexible (Outside PTF) ?Significant variation allowed as long as overall capacity requirements remain at the same levels Time Fences 8 15 26 Weeks Frozen Moderately Firm Flexible Firm Customer Orders Forecast and available capacity Capacity DTF PTF MPS Time Fences MPS Planning Horizon Today Future Visibility (36 Months) Procurement Fabrication Assembly Cumulative Lead Time Emergency Changes Mix Changes ONLY Rate and Any Change DTF PTF MPS Time Fences ? Provide an input to rough cut capacity planning. ? Procuring long ranges resources. ? Give purchasing more time to work with suppliers. MPS 技術 (2) ? 預計可用量 (PAB) 表示若採行 MPS建議的行動訊息及計劃訂單，各期期未的預計庫存量 。 ATP出現(xiàn)在 MPS報表中的第一期及有在途訂單或計劃訂單的時段 。 ? TPOP的技術用在 MPS和 MRP的計算上。 ?材料主檔 (item master)中，某項目定義為MPS項目，則所有上階父件均為 MPS項目，均由 MPS系統(tǒng)處理。 ?只有在材料主檔中「訂購政策」定為 MRP的材料， MRP系統(tǒng)才會計算其材料需求。最終產(chǎn)品通常包含標準項目和針對顧客需求特別設計的項目。 ? 接單組裝 (AssembletoOrder, ATO)：關鍵零組件根據(jù)客戶需求預測，事先計劃、採購、生產(chǎn)、並儲存在倉庫中，在接到客戶訂單時，領出客戶指定的關鍵零組件，組裝成最終完成品。 MPS Approaches MTO ATO MTS Approach Control point MPS unit Backlog FAS Forecast Cust orders Options End items Product level End prod. End to Intrm. End prod. Cust order promising High requirement Low requirement Forecast accuracy Low requirement High requirement Use of Planning Bill Yes Yes No Cope with design and process uncertainty High need Low n
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