FAQ - What functionality / modules would you expect in MRP, MRPII (Manufacturing Resource Planning) or ERP (Enterprise Resource Planning)?
The history of the development of ERP:
1960 IBM developed MRP (material requirements planning) and launched their RPS (Requirements Planning System) program.
1972 Oliver Wight, Joe Orlicky and George Plossel defined MRPII (manufacturing resource planning) which added master scheduling, sales and operations planning and capacity planning to MRP
1985 ERP (enterprise resource planning) systems introduced - MRPII plus other business functions such as human resources
1990+ APS (advanced planning systems) introduced - MRPII plus finite capacity planning and scheduling.
Typical MRP II modules
Functionality added to MRPII to create ERP
Functionality claimed in many ERPs but usually only partial ("Best of Breed" still dominate these areas)
For more information see the ERP Survival Guide .