Decision: proposing a design and keeping the choice

How a design is put to a reviewer and how the decision is kept for whoever later asks why. The shapes are the design document and the decision record.

Principle	Claim
The decision asked comes first	a proposal opens with what the reviewer must decide
Design the failure paths	a design names how each part fails and how that is handled
Keep the options that lost	a record lists every option, with why the others lost