Why it is useful
A design and development plan is required to ensure that the design process is appropriately controlled and that device quality objectives are met.
How to use it
1. If you are developing a brand new product, establish as much as possible of this plan in the planning phase of your project.
2. If you are making a revision of an old product, or adding a product to a range that this plan applies to, the plan might only have to be updated slightly.
3. Note that the plan shall be maintained, that is, it should reflect what you are doing and the other way around.