Replanning provides an alternate way to procure your stock; instead of creating a new suggestion, replanning will optimize an existing planned or firm ressource (by increasing the quantity and/or replanning the receipt date). It acts like grouping suggestions on existing planned or firm document if within the replanning leadtime. It can as well identify ressources which are not useful.

When running replanning in simulation, it is expected you apply the replanning messages (recommanded changes). You can do this one per one using the planning workbenches or in mass using FUNDTUMRP. If you don't do this, you will have a shortage.

When running replanning in messages only, you have both replanning messages and the suggestions. It is expected you choose either to create a new planned/firm ressoucre from a suggestion OR to apply the recommanded changes on existing document. If you apply both, you will double the stock quantity really needed.

The safety stock is indeed the quantity targeted at the end of each bucket.

Why do you think you did anything wrong? 

Replanning provides an alternate way to procure your stock; instead of creating a new suggestion, replanning will optimize an existing planned or firm ressource (by increasing the quantity and/or replanning the receipt date). It acts like grouping suggestions on existing planned or firm document if within the replanning leadtime. It can as well identify ressources which are not useful.

When running replanning in simulation, it is expected you apply the replanning messages (recommanded changes). You can do this one per one using the planning workbenches or in mass using FUNDTUMRP. If you don't do this, you will have a shortage.

When running replanning in messages only, you have both replanning messages and the suggestions. It is expected you choose either to create a new planned/firm ressoucre from a suggestion OR to apply the recommanded changes on existing document. If you apply both, you will double the stock quantity really needed.

The safety stock is indeed the quantity targeted at the end of each bucket.

Why do you think you did anything wrong? 

Thank you for the response Julien. What we were hoping for ideally is for the MTS products we would get WOS's from the forecast beyond a certain horizon, say 3 weeks out, then have the replanning message display on the WOF's inside of that horizon. We would then act on the demand causing the message or the supply suggestion. Make sense? We're new on X3, Came from 500 where the MRP options were much more simplified.

jm

Turns out by changing the forward leadtime to 7 days the simulation method worked as we would expect. We had it out there for 100 day leadtime and the 1st message was to increase the 1st WOF to cover all requirement to the 120 day mark.

Correction - out to the 100 day mark described on the forward leadtime.

Julien - I thought that with simulation mode, X3 will assume you acted on the message you were given and replan everything downstream accordingly.  We have a "cancel" message on the top level of a bom, but it's still showing as demand for a component.  Do we need to act on the messages for it to trickle down to the components ? 

Yes, you have to do something about the mismatch or just accept the result. You could temporarily turn off suggestions on the prod-site record. Just a thought...