Product differentiation Fea Perfor Conform Form Quality ance tures mance Qualit Dura- Relia- Repair- bility bility/ ability Style>Design20 Product Differentiation Form Form Fea- tures Fea- tures Perfor- mance Perfor- mance Quality Quality Conform- ance Quality Conform- ance Quality Dura￾bility Dura- bility Relia- bility Relia- bility Repair- ability Repair- ability Style Style Design Design