The Informed Design Cycle

9. Reenter the design cycle at any step to revise

Iteration is the real key to engineering problem solving. Rarely are problems solved in one cycle. The matrix is a tool you use again and again as you move through a project.
The first round of problem solving is used to find a problem within an area of concern, while the second round narrows the focus of inquiry. Progressively tighter definitions of the problem bring new specifications, new alternative solutions, new rounds of research and new matrix analyses.