How Execution Fails: ten failure modes to recognise early.

Why does execution fail even when the plan is sound?

Chapter 14 opens with the principle that every doctrine must name its failure modes, and lists ten. The first four concern the cycle itself breaking: misidentifying the constraint, so effort goes into something that is not limiting output; diffusing effort across several improvements at once; designing an improvement that is never implemented, because leadership changes, the team resists or no one owns it; and failing to measure output, so no one can tell improvement from activity.

The next three are errors of judgment. Impatience makes executors abandon the approach after two or three cycles, before compounding shows. Then come two mirror-image mistakes: changing people when the constraint is structural, so a new person meets the same limitation, and changing tools or processes when the constraint is human, since a person who lacks skill remains unskilled even with better tools.

The last three return to discipline. Inadequate follow-through in the Act stage, where the next cycle’s plan is not actually different, is called perhaps the most common. Mistaking activity for progress: the team is busy, effort is high, output is flat. And local optimisation without system thinking, such as cutting unit cost while degrading quality and losing sales, or accelerating development while building technical debt. Knowing the ten modes, the chapter argues, lets an executor recognise them quickly and adjust.

Vinay’s short talk You Don’t Have a Strategy Problem. You Have an Execution Problem. is a two-minute way into the same idea.