This is a list of the main factors that will have an important influence or impact on the development of the design.

For Products these may include the following

1. Its function or functions
2. The packaging of components
3. The operation Principles
4. The form (of individual parts)
5. The Materials used (for individual parts)
6. The Manufacturing Techniques
7. Ergonomic issues

From this list a series of options will be created. The next step is to chart options