3. How to use two-level MSP?
We will describe successively the action to be taken on bills of material and lead time reduction.
3.1. Action on bills of material
All creation of variety in a product line is likely to render inventory management and the scheduling more difficult. However, if the choice exists, it is preferable to take a formula that leaves the product in a standard form as far as possible in its manufacturing cycle (delayed differentiation concept). Thus the product is personalized as late as possible, which renders production less vulnerable to gaps between forecasts and real orders. In the case of two-level MPS, modularization allows, using delayed differentiation, the level of the bill of material to be reduced, especially by the introduction of phantom items. Thus, in our example, the electronic assembly was initially a subset manufactured according to forecasts and put in stock. Supposing that the time taken to mount the board in its case is relatively short, this mode of management will present two disadvantages. On the one hand, we put subsets (including the added value of the assembly) in stock, which increases the cost of stocks. On the other hand, this system can provoke breaks in stocks: there is a risk of having cases equipped with a 110 V board, as well as with 220 V boards, but no more empty cases left to build 220 V subsets (the case being a common component).
The solution therefore, consists in integrating this mounting operation into "nal assembly according to the configuration required by the customer
3. How to use two-level MSP?
We will describe successively the action to be taken on bills of material and lead time reduction.
3.1. Action on bills of material
All creation of variety in a product line is likely to render inventory management and the scheduling more difficult. However, if the choice exists, it is preferable to take a formula that leaves the product in a standard form as far as possible in its manufacturing cycle (delayed differentiation concept). Thus the product is personalized as late as possible, which renders production less vulnerable to gaps between forecasts and real orders. In the case of two-level MPS, modularization allows, using delayed differentiation, the level of the bill of material to be reduced, especially by the introduction of phantom items. Thus, in our example, the electronic assembly was initially a subset manufactured according to forecasts and put in stock. Supposing that the time taken to mount the board in its case is relatively short, this mode of management will present two disadvantages. On the one hand, we put subsets (including the added value of the assembly) in stock, which increases the cost of stocks. On the other hand, this system can provoke breaks in stocks: there is a risk of having cases equipped with a 110 V board, as well as with 220 V boards, but no more empty cases left to build 220 V subsets (the case being a common component).
The solution therefore, consists in integrating this mounting operation into "nal assembly according to the configuration required by the customer
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