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Question

Different order quantities for Make vs Buy on same item

  • February 2, 2026
  • 1 reply
  • 7 views
J
Varsity I
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We have a stock item that is primarily manufactured, but can also be purchased / outsourced when required.

Since the Item Master allows only one Replenishment Source, we would like to understand how MRP handles order quantities:

  1. If MRP generates a Manufacturing Order, does it use the Inventory Planning tab (min / lot size)?

  2. If the same item is planned as a Purchase Order, does it use the Vendor tab minimum order quantity?

As per my understanding, MRP behavior is driven by the Replenishment Source, and standard MRP does not support planning the same item as both Make and Buy automatically with different order quantities.
Please let me know if this understanding is correct or if there is a supported approach.

1 reply

angierowley75
Acumatica Moderator
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  • angierowley75
  • Acumatica Moderator
  • February 3, 2026

MRP/DRP currently does not observe min/max.

You can set the item replenishment source at the warehouse level.

MRP will recommend that you build/buy/transfer based on the source specified at the warehouse.

On Inventory Planning Display, even if the recommendation is to build, you can create a purchase order for the needed quantity.

 

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