E1: 34: Use Work Center Hours in Variable Leadtime Planning Schedules (R3482/R3483)
Last updated on JUNE 06, 2018
Applies to:JD Edwards EnterpriseOne Requirements Planning - Version 9.2 and later
Information in this document applies to any platform.
On : 9.2 version, MRP R3483
The MRP Recommended Start date for a Make Item using Variable Lead Time is Incorrect.
The variable leadtime back scheduling calculation used by MRP does not match the back scheduling calculation used in shop floor control P48013 application. The manual entry of a work order in P48013 currently uses a factor (F4102.LTCV) that takes the work center hours in the standard routing P3003 into account to back schedule the work order start date.
MRP planning currently does not utilize the work center hours. Instead the P3002 branch plant manufacturing constants work hours are used to backschedule variable leadtime manufactured goods. This is inconsistent and can lead to overstated or understated lead times that puts a potential burden on the shop floor to schedule and source materials to meet the production plan per the MRP generation.
The issue can be reproduced at will with the following steps:
Enter a manufacturing branch plant with three shifts of 8 to 10 hours per shift. Enter a manufactured planning item to use variable leadtime. Enter a bill of material and standard routing to use work centers with less than three shifts and less than the 8 to 10 hours per shift used in the branch plant. Perform a leadtime rollup to populate the leadtime per unit in the item branch record.
Enter a firm work order supply order using P48013 for a future request date, such that the work order start date is assigned a future date.
Enter planning demand in excess of supply, with varying future demand dates, including the same demand date as for the manually entered work order above. Run R3482 and or R3483 and review messages. Note any discrepancies between the shop floor calculated start date and the start date written into the F3411 by the MRP planning run. Process O messages to firm production work orders.
For the P3411 firm work order, inquire and select the order using P48013. Blank out the start date, allowing P48013 logic to recalculate the start date using the (fewer) work center hours than exist in the branch plant, and verify that the start date returned by P48013 is for an earlier date than established from planning. This is incorrect. The dates need to match.
Note: The planning uses the lead time per unit LTPU and the shop floor uses the LTCV leadtime conversion factor, which leads to inconsistent results between the two modules. This is inconsistent.
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