Strongly agree: scribbling requirements, process maps, and block diagrams goes a long way to understanding what needs to be done, as well as getting us to think

Strongly agree: scribbling requirements, process maps, and block diagrams goes a long way to understanding what needs to be done, as well as getting us to think through what'll be the easy parts and pinch-points. Goes back to Fred Brooks' Mythical Man-Month: Start with understanding the requirements; then design the architecture. Only after that, begin programming.