MRP to run only certain days

MRP in IFS doesn't have a native "filter by supplier" option — it plans by part, not by supplier — so you get this by combining two separate mechanisms: Selective MRP (to scope the run to only the parts sourced from those suppliers) and a Weekly database task schedule (to control which days it fires). Here's how to set it up:

1. Give MRP something to filter on

Selective MRP filters on part attributes (Planner/Buyer, Product Family/Product Code, part number range, warehouse, ABC class — the exact list varies slightly by version), not on the supplier field itself. So the prerequisite is making sure the parts you buy from these particular suppliers share one of those attributes — in practice, the cleanest way is to assign them a dedicated Planner/Buyer code on the Purchase Part / Inventory Part Planning data. If you don't already segment planners by supplier, this is the gap to close first.

2. Run Selective MRP against that filter

Open Perform Site MRP, use the Selection command (this is what turns a run into "Selective MRP" rather than a full Site MRP), and set the criteria to the Planner/Buyer (or Product Family/Code) you assigned in step 1. This scopes the calculation to just those parts/suppliers instead of net-changing the whole site.

3. Schedule it as a Database Task Schedule, Weekly, on the days you want

Rather than running it manually, go to Scheduled Tasks → New Database Task Schedule, pick Perform Site MRP as the task, and set the Execution Plan to Weekly — this lets you tick only the specific weekdays you want it to fire (e.g. Tuesday and Friday only). On the parameters step, supply the same Selective MRP selection from step 2 so the schedule only ever plans that subset of parts. Leave your normal full Site MRP job on its existing (presumably nightly) schedule for everything else — the two coexist without conflict since one is a targeted selective run and the other is the full-site run.

Because this becomes a targeted, low-frequency run, demand changes for those parts (new sales orders, safety stock changes, etc.) won't get replanned until the next scheduled day. If there's a risk of urgent shortages in between, it's worth pairing this with the ability for planners to trigger an ad-hoc Selective MRP run manually using the same saved selection.

if this is a big enough issue we can fix this with Flow