APICS CPIM CSPS CFPIM

APICS Certified Supply
Chain Professional (CSCP) Program

APICS Certified in Production and Inventory Management (CPIM)

APICS Certified Fellow in Production and Inventory Management (CFPIM)

www.productionplanningpro.com
http://www.productionplanningpro.com/products/

www.productionplanningpro.com and also used their CPIM iPhone app (just search CPIM in the app store).