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E1: 34: R3482/R3483 MRP Not Planning Correctly or S&D P4021 Appears Incorrect FAQ (Doc ID 641434.1)

Last updated on JULY 06, 2020

Applies to:

JD Edwards EnterpriseOne Requirements Planning - Version XE and later
Information in this document applies to any platform.


This document contains common reasons MRP does not appear to plan correctly, and the P3413 Time Series or P4021 S & D Inquiry appears incorrect.  Information is included on what to check to validate and use for explaining the MRP output.

One common misunderstanding is that the P4021 is only unadjusted amounts, or values not reflective of MRP messaging.  Using the Time Series (P3413) when questions arise, will most often resolve or explain what is occurring with the items in question.

Questions and Answers

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In this Document
Questions and Answers
 MRP R3482/R3483 Output
 Question 1:  What to check if R3482 or R3483 MRP fails to plan lower level items (components) or dependent demand?
 Question 2:  Why is R3483 not respecting the FOQ or multiple order quantities when transferring from Supply Plant?
 Question 3:  Running R3482/R3483 wide open over all the items does not plan all the items. What causes this to happen?
 Question 4:  MRP does not appear to be planning phantom components. Should phantom components be planned?
 Question 5:  MRP is planning in order multiples, but Item Branch is not set up with Min, Max, or Multiple.  Is this correct?
 Question 6:  How best to create multiple fixed order quantity work orders to meet a single sales order total demand? 
 Question 7:  Why is Fixed Order Quantity not working with manually changed work order?
 Question 8:  MRP is not Creating Order Messages
 Question 9:  Why does MRP ignore Effective Dates for Batch Bills?
 Question 10: Why does MRP R3483 run not plan for any items and return output as "No data selected"
 Question 11: Why does MRP R3483 suggest incorrect order messages for past due periods = 2 setup in MRP processing options?
 S&D Inquiry (P4021) Results Do Not Appear Correct
 Question 1:  Why is P4021 not displaying the demand or supply expected?
 Question 2:  Why is a lot on hold not appearing as available, even though MRP is run to include the held lot code?
 Question 3:  In XE, why is the P4021 application not including past due supply in available calculation?
 Question 4:  How can planned Work Orders (WO Doc type, no order number yet) not be included when viewing Supply and Demand Inquiry?
 Message Related (P3411)
 Question 1:  When running R3483 to generate planning messages, why does MRP fail to give a message for an item that is needed?
 Question 2:  MRP giving incorrect message recommendations.
 Question 3:  What causes messages to fail and past due orders not to increment stock?
 Question 4:  For a purchased component, why does MRP suggest a WO message instead of the expected OP message?
 Question 5:  Why would MRP  create order messages in the past?
 Time Series Related (P3413)
 Question 1:  MRP does not generate a planning messages but the time series (P3413) shows the +PLO, why?
 Question 2:  MRP isn't creating the correct component demand.
 Question 3:  Why, when viewing the Time Series, Beginning Available quantity is correct, but the "Ending Available" appears to be a much higher quantity?
 Question 4:  Incorrect POU in Time series Causing Incorrect MRP Message for Lot Item

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