The situation
Trident Labs came to us with the problem described above. We started with a paid discovery phase to map the current state, quantify the cost of leaving it alone, and agree what success would be measured on.
What we did
Delivery ran in fortnightly increments with a shared board and a demo at the end of each cycle. Every architectural decision was written down, and the client's own engineers were in the room for each one.
The result
The numbers above were measured 90 days after handover. Documentation, infrastructure definitions and source code sit in Trident Labs's own accounts.