How to Pinpoint the Controlling Factor Across the Performance System

Take your list of possible causes and assign each to a category: unclear information, missing resources, or misaligned incentives. Keep a fourth bucket for causes that sit with the person, a real capacity or knowledge limit, so those are not forced into an environmental one. Sorting by type stops an information fix landing on an incentive problem.

Observe the person doing the relevant task and compare it with work they have demonstrated under comparable conditions. Check expectations, access, time, competing demands, and consequences. If a step still needs coaching, arrange it; also address conditions that prevent the person from using the skill.

Hold each surviving cause against what you actually observed, not what feels most likely, and drop any cause with no observation behind it. A favorite theory the evidence has already ruled out only widens the search. Keep only causes an observation supports.

Prioritize changes by the evidence that each condition contributes and the effect a change could have. Record what you expect to see. Address interacting conditions together when needed, and check later work before crediting a particular change.

When the same controlling factor recurs across cases, write it into a shared library with the category, the confirming observation, and the path that found it. Point the next colleague at the pattern instead of walking a new case from scratch. A pattern that stands alone saves the team the diagnosis time.