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Former Member

MRP Procurement proposal

Hi,

I am facing two issues in MRP Net requirement calculation and scheduling.

Below given are the details of the situation.

Master data:

Material: X

Opening stock: 5000kg

Safety stock: 2500kg

Planning time fence: 42days

MRP TYPE: P3 (Firming type 3)

Lot size procedure: Monthly lot size

Minimum lot size: 6000kg

Procurement type: E (in house production)

Issue:

1. MRP is generating a procurement proposal (Planned order) and moving it to the last of planning time fence, even though there are existing receipt elements (planned orders and production orders) to cover the requirement during that period.

Ideally the new procurement proposal is not required in that period

2. Within planning time fence the quantity of the procurement proposals(planned order in this case) are calculated based on Monthly lot sizing procedure(sums up the requirement of one month) and after planning time fence, quantity of procurement proposals is calculated based on minimum lot size defined in material master (6000kg)

Please provide the explaination/solution for the issues mention above.

Thanks in advance

Nataraj

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3 Answers

  • Posted on Apr 17, 2008 at 06:02 PM

    Hi Natraj,

    MRP type used is P3, hence if there is are procurement proposals already existing inside the planning fence period, will be shifted outside the planning fence peiod when mrp is run.

    If you do not want to shift this one then try with mrp type P1. This will firm the procurement proposals already existing withing the planning fence period & new procurement proposals will be created outside the planning fence peiod.

    For the second question:

    Since monthly lot size is used all the requirement for a month is cumulated & procurement proposals are created.

    Outside the planning fence if the requirement for a month is less than 6000, which is the minimum lot size, then system will plan for the minimum lot size.

    Regards,

    Senthilkumar

    Edited by: Senthilkumar SD on Apr 17, 2008 11:32 PM

    Edited by: Senthilkumar SD on Apr 17, 2008 11:33 PM

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  • author's profile photo Former Member
    Former Member
    Posted on Apr 18, 2008 at 05:52 AM

    Hi,

    pls check the reqmt qty and the sum of Stock plus the receipt elements .

    Unless there is a shortage , the system will not create a new proc proposal and schedules it to the the end of PTF.

    ( With firming type 3 , all procurement proposals that are necessary for requirements coverage are displaced to the end of the planning time fence )

    Regards,

    Sheik

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  • author's profile photo Former Member
    Former Member
    Posted on Mar 18, 2009 at 03:33 PM

    Thanks.

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