At each stage of the product life cycle, certain aspects are key. For example, in the early stage, Development, it is important to be compliant with FDA and EU regulations but even before that to have a coherent research method to focus on a product and its vision. This can be helped by using Project Management and Project Evaluation systems like Microsoft Project and Stage Gate.

For the rest of the parts of the cycle, pick one part and describe what kinds of aspects are of key importance for them.