Products can often be designed as a set of modules that can be fitted together to provide a combination of functions. It allows customised products to be created from a set of standard modules, products to be altered or upgraded to meet the users changing needs, and for products to be easily repaired.

Pros: Reduced disposal of products
Pros: Increased appeal of products and incentives for repeat business
Cons: Increased product life may reduce sales turnover
Pros: Products can more accurately address users needs over the life of product. Extended product life offers good value for money.