Successes, failures, and what we learned from them
Case studies
Case studies from recent work and stories from earlier years: what the problem was, what we built, what changed, and what we would tell you on a call.
Case study 2024 to 2026
300 teams, XP, and the habit that stuck
Two years, about 1,000 people coached, and roughly 10% better lead time and change failure rate
How a Fortune 100 financial company moved its teams toward extreme programming: what two weeks in class and six at the desk changed, and which habits outlasted the coaches.
ReadCase study 2020
When paychecks depend on Excel formulas
A regulated payment's path from a spreadsheet to a dedicated system, with an audit trail and five times the throughput
An HR department calculated a regulated payment in one spreadsheet. What replaced it, what it changed, and what I'd do differently today.
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