Start with drawing control and work your way from drawing to bom to final product.
Do a Google search on 'engineering configuration management'
Then check out Devon Sowell's pdmsolution.com website. http://www.pdmsolution.com/products.htm He has some books you can purchase to help you with implementing ePDM.
ePDM is the tool. You need to have your engineering design process and release process sorted first. Then set up ePDM to control your established process.