1.6.Matching Process and Product Life Cycle The Product-Process Matrix(PPM)was developed by Hayes Wheel Wright in 1979; Link product and process life cycles in two dimensions √/Process structure vProduct life-cycle stage1.6. Matching Process and Product Life Cycle • The Product-Process Matrix (PPM) was developed by Hayes & Wheel Wright in 1979; • Link product and process life cycles in two dimensions  Process structure  Product life-cycle stage