Local Optimum

A local optimum is an improvement that looks good in a narrow view but doesn't help — and may even hurt — the system as a whole.

Examples

• Speeding up one factory step that wasn't the bottleneck.
• Hiring one more salesperson when marketing is the real problem.
• Adding more tests to a curriculum that already teaches the wrong content.
• Optimising code that isn't on the critical path.

Why local optima are tempting

• Visible. You can see the narrow improvement.
• Measurable. Easy to point to the metric going up.
• Rewardable. People get credit for "improving" things.
• Comfortable. They don't require understanding the whole system.

CF's view

CF, with ToC, treats local-optimum thinking as a major source of waste:

• In business. Optimising departments instead of throughput.
• In personal life. Optimising routine habits instead of the bottleneck.
• In learning. Mastering details instead of the critical concept.
• In debate. Winning individual arguments instead of the meta-level question.

The fix

• State the goal explicitly. What does global success look like?
• Find the constraint. What actually limits the goal?
• Focus there. Don't get distracted by easy wins.

"Improving a local optimum could be making one step in a factory go faster. In the small picture, looking at things narrowly, that looks like an improvement. But will that result in more products being produced? Probably not." — criticalfallibilism.com