Planned obsolescence is often an element of product design. Designers should instead seek to eliminate the obsolescence of products by increasing durability. This includes physical toughness, but also design for repair and upgradability, and design for emotional attachment. It is important that energy consuming products are designed so that energy saving modifications can be made to the product over time.

environmental sustainability Pros: Reduced waste. Reduced consumption of resources
Cons: Increased energy consumption by old, inefficient models of not designed properly for upgrade
financial sustainability Pros: Long term customer loyalty. Reduced long term production costs
Cons: Reduced sales turnover
social sustainability Pros: Products can be depended on to meet needs