Sceduling dates of Pld order based on no of individual members of capacity

Dear Friends,

I am working on scenarion where in mechanical workshop there are groups of machines. In SAP say lathe machine we have configured as single work center with individual capacity = 5 to represent 5 individual & identical machines in the factory.

Lead time of item is 5 hrs per piece and hence MRP works as follows

if qty = 1 , order lead time is considered as 5 hrs but if qty is = 100 then it is taking 500 hrs.

This behaviour is even though standard, it is not acceptable. Is there any workaround so that system will consider the individual capacity & will give lead time 500 / 5 ( no of capacities) = 100 hrs,

Your suggestions / solution will be highly apprciated

Thanks in advance

Mangeah A. Kulkarni