Yep, the design phase shouldn't be an exclusive OR between a large-scale design & small-scale designs with iteration. It should be both: plan the large-scale ar

Yep, the design phase shouldn't be an exclusive OR between a large-scale design & small-scale designs with iteration. It should be both: plan the large-scale architecture, marking the bits which are unknown, then iteratively design & build to fill out the unknowns & build the rest of the design. It's a recursive process. solve([problems]) 1. Define car(problems). 2. Plan a solution. 3. Implement the solution. 4. Test the solution. 5. Document the results. Add any problems discovered to the list. 6. solve(cdr(problems))