Top Model Lead time in ATP Calculation

Hello,

We have a TOP MODEL and few option classes and options under it. Presently, there is a routing for the top model and also a Fixed LT in the item definitions of the top model. But we don't do a LT rollup on the it. The end result is that the star item gets its lead time from the routing but the LT on the top model remains the same as put in by the user manually.

We get a Sales Order for the model, we configure it and then check ATP details.

The ATP goes all the way down to the last level of BOM. The observation is that the ATP check also includes the Fixed LT of the TOP MODEL(from the org-item definition) along with the LT of lower level components.