[tonyedgecombe]

>Nobody starts building a house without knowing final design.

There is a TV series in the UK called Grand Designs where people build their own houses. Nearly every cost and time overrun is down to making stuff up on the hoof. The few projects that are on time and budget are the ones that decide everything upfront.

[skeeter2020]

I've watched this show, and the process - and results - look an awful lot like software development projects. Just replace the owner with a c-suite executive.