Linking between Master Item & FG Items through ASCP Workbench

Hi All

We are running ASCP with OPM in R12 environment. For most of our products, the process flow is as given below.

Ingredients (A, B, C, D, E) > Master Item Batch (X) > Finished Goods Batches ( W, Y, Z, V)

So basically the master item is an intermediate for the multiple finished goods made out of it. The sales order and forecast demand comes for finished goods items ( W, Y, Z, V) only.

Now, we are thinking of having a linking (pegging?) between few Master Item batches with their Child finished goods batches. Can someone suggest any effective way to do this?