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A customer raised the following concern in Application 10:

“Earliest Unlimited Supply Date” used for Purchase Parts, applied/functioning for Manufactured parts. What is the feature in the application which handles “Earliest Unlimited Supply Date” but for manufactured parts?

We must be able to visualize short-term disturbances i.e. prolonged lead times for manufactured parts, more or less the same idea/logic as for Purchased parts.

Example/scenario:

The standard lead time is 10d for manufacture. part X.

When the production planned to finalize the production schedule it outlines that the shop order (best possible) is planned to be finished on day 15 = true lead time is 15d as the SO can’t be improved.

Standard lead time could not be kept/respected. At this point, the production planner must be able to indicate a prolonged lead time -> update the “EUSD” (if that was doable) acc. to the scheduled SO to show the current plannable lead time for new demands.  Otherwise, new demand or new MRP requisitions will be planned according to standard lead time = 10d. 

Hi Praveen,  As per the test scenario mentioned, if I was the planner I would have done the following. Because production planning and MRP planning goes hand in hand. In planning hierarchy, shop order scheduling comes after the MRP execution is complete. But they effect each other directly. as you said, due to shop floor situations, Material plan and Shop Order schedule may not be in sync. Lets take your example above, if the routing lead time calculation has been done properly and updated the lead time to inventory part, ( and/or) used CRP support in MRP execution, the SOR created by MRP will  have start and finish times as per the routing ( which will represent 10 days as per the test case).  Then suppose , due to some situation in shop floor, the order is scheduled late ( in the test case 15 days). Now , this has two effects.  One is the order may not meet the demand of the demand order ( may be another shop order  or a customer order). The other one is, the material planned for this shop order will arrive early ( if material is ordered as per last MRP run).  To balance out the supply /demand situation again, the planner should execute MRP again. This will delete earlier created reqs and re-planned as per shop order dates. MRP will indicate the effect of rescheduling shop order late by “Early and Late “ order messages, which should be resolved to get the intended outcome. Resolving Early and late order messages may require running MRP again to balance out supplies. As you can see, the process of scheduling shop orders , running MRP  has to be properly “Scheduled” to get the best outcome. 

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