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Software Design: Tidy First?

Formal Methods Pay Off Reject Change, Sometimes Baking a Model Busy is Short Volatility Speculative Short Volatility & Neglectful Short Volatility Canon 3X: Explore/Expand/Extract How Do You Know That? Long Volatility Development The Beginnings of an Idea: XP is Long Volatility When Complaints Are Good News Air Traffic Control The Cost YAGNI Was Never About Why So Literal? Smalltalk Genie Hey, N00b, We Didn't Hire You to Complete Tasks A Learning System Made of Learning Parts You Don't Get to Create Anything Trust Factory Genie Lessons from Genie Sessions: Prose as a Programming Language Scope Is The Steering Wheel Itchy Brain Thinkies World Congress II: May 20, 2026 Thinkie: Wider Scope Thoughts, Not Thinking? Did We Do This to Ourselves? Adaptive Radix Tree Genie Sessions: Run, Right, and Fast for the Adaptive Radix Tree Unstick Your Stuck Thinking Genie Tarpit Genie Lessons: Nobody Wants Agents
Long Vol: What is Volatility?
Kent Beck · 2026-07-22 · via Software Design: Tidy First?
Kent Beck's avatar

Jul 22, 2026

∙ Paid

Some basic assumptions:

  • We don’t know how users will perceive the features we deliver. (We have suspicions, opinions, but users/buyers/investors continually surprise us.)

  • We don’t know how users will talk about features in their communities.

  • We don’t know how much it will cost to implement features. (Today’s answer is “less” but we still don’t know how muc…

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