>>Yes, there are lots of parts involved in the MRP-II.:)
Ping,
The American Production and Inventory Control Society (APICS) is dedicated to philosphies regarding this whole arena, including MRPII and Just-In-Time practices.
You might also look up the Oliver Wright Companies website :
www.oliverwightasiapacific.com/ScapeOliverWightHome.htm
Gil Munk
"If a nation expects to be ignorant and free, it expects what never was and never will be." - Thomas Jefferson