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IFS has a lead time on the Inventory Part, but the moment there is a Shop Order with Operations, this prevails when it comes to lead time calculation. As this might seem logical, it is not. Many companies use fixed lead times per Part and this is now not possible in IFS. Why not have an extra setting on the Inventory Part in which you can choose? And in between should be the option to have fixed/minimum lead time per operation. So in the end we would have a hierarchy:

  • Use fixed lead time per Part
  • Use fixed lead time per Operation

If none of these 2 settings is true, use operation calculated lead time.

On the inventory part, the expected lead time can be set separately and independently as a fixed value from the manufacturing lead time.  This is the lead time used on the availability calculation for a customer order.

On the work center, the value for queue time can be set as a fixed number that is applied each time that work center is used for an operation.

Have you tried to adjust either of these times to address your planning intention?

Yes we have considered both, but these did not fulfill customer requirements. We will most probably implement a seperate lead time operation (non parallel( with a seperate calendar in addition to the actual operations (which are all parallel planned).

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