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Planned Orders with Minimum Lot size in Make-to-Order case

Question: can the MRP-run create planned orders that respect the minimum lot size (material master), if the original independent requirements have consumption w/o assembly (MTO)?

I have noticed that the minimum lot size is ignored depending on the requirement class/type of the planned independent requirement. For example, I see that planned orders with independent requirement types VSE (of strategy 50) and VSEV (of strategy 60) do not respect the minimum lot size, until the moment that there is a customer order matching the planned order and a purchase requisition is created, respecting the lot size.

Does anybody know how to solve the problem? In our company, the created planned orders are used as a forecast to the vendors.

Therefore planned orders should consider minimum lot size.

Thank you so much!

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4 Answers

  • Best Answer
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    Former Member
    Oct 17, 2008 at 05:42 PM


    Normally in MTO scenario, Lot for order qty lot size is used. Please explore the possibility to use this lot sizing procedure.


    V. Suresh

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  • Oct 18, 2008 at 11:21 AM


    Make-to-order strategies should always be combined with lot-size key EX (lot-for-lot.Rounding values , minimum , maximum lot sizes, etc. should not be used. If you use they have no effect due to the make-to-order properties of these strategies.

    You can have for MTO Strategy 50, at the max you can have Rounding Values.

    If your requirement can be fulfilled with Rounding then you need to maintain the below settings.

    Transaction : OMI4

    MTO Lot Size: "1" Lot-for-Lot with rounding.

    Hope it will help you.



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    Former Member
    Oct 20, 2008 at 10:27 AM

    Hi all,

    I tried following settings:

    Material master:

    - Strategy 50 - Planning without final assembly

    - Lot size EX

    - Min Lot Size and Rounding Value (=200)

    OMI4 customizing:

    - MTO Lot Size: "1" Lot-for-Lot with rounding for lot size EX

    Still the MRP run will deliver planned orders with lot size < 200.

    Is there something else I could do?

    Thank you in advance for the support!

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  • Dec 02, 2011 at 06:21 PM


    Please consider the following note, which provides the explanation about

    to this behavior of the lot-size, when VSEV requirements are used:

    125498 - MRP/Docu: Planning segment and lot-for-lot order quantity

    The following section of the note describes your scenario in detail:

    "The planned independent requirements for a material are in a separate

    planning segment (planning strategy planning without final assembly,

    requirements type VSE, VSEV).

    You enter a rounding value or a rounding profile or an lot size that is

    not exact in the material master.

    Material Requirements Planning:

    In Material Requirements Planning, planned orders are generated for the

    planned independent requirements. The lot size settings (such as fixed

    lot size or minimum lot size) are also not taken into account."



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