Total replenishement lead time (MRP3 --> availability check)

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MRP3-- > Availability check ---> Total replenishment lead time (in workdays)   

    For in-house produced material and it is taken into consideration in the availability check .  In an availability check where the system takes the replenishment lead time into consideration, it only checks whether there are sufficient incoming quantities and stocks available to cover the requirements within the replenishment lead time. Outside the replenishment lead time,the system assumes that the material is available in sufficient quantity.



if  for the material which is procured by external procurement  , procurement type: F

requested PO delivery date  + GR Processing time(MPR2-->scheduling) == > PO requirement/receipt date  (MD04)

PO document date +  planned delivery time (MPR2-->scheduling) == > realistic delivery date    

Total replenishment lead time (in workdays)

The total replenishment lead time is the time needed before the product is completely available again, that is, after all BOM levels have been procured or produced. It is not calculated by the system, but defined in this field as the total of the in-house production time(s) and/or the planned delivery time(s) of the longest production path.

This time is necessary if, for materials produced in-house, the replenishment lead time is to be taken into consideration in the availability check.

In an availability check where the system takes the replenishment lead time into consideration, it only checks whether there are sufficient incoming quantities and stocks available to cover the requirements within the replenishment lead time. Outside the replenishment lead time,the system assumes that the material is available in sufficient quantity.

Therefore, in this situation, it is usually necessary to depict the product‘s total replenishment lead time with all BOM levels as the replenishment lead time.

Use

The following options exist for materials produced in-house if the replenishment lead time is included in the availability check:

• The Total replenishment lead time field is maintained.

In this case, the time maintained in this field is used for the availability check.

• The Total replenishment lead time field is not maintained.

In this case, the system reads the in-house production time and, if available, the goods receipt processing time, and interprets the total of these two times as the replenishment lead time for the availability check.

Note

There is no point in maintaining the Total replenishment lead time field for materials procured externally. In external procurement, the system adds the processing time from purchasing, the planned delivery time, and the goods receipt processing time and uses this total as the replenishment lead time for an availability check with replenishment lead time.

Total replenishement lead time (MRP3 --> availability check)

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原文地址：http://www.cnblogs.com/jefflu2012/p/4223556.html