What does it mean that error budgets?

Accept that some error rate is normal and define how much error is tolerable.

Example: You launch a new weekly review habit. The first month, you complete it five out of eight weeks. Your instinct says failure — you missed three weeks. But you never defined what success looks like. If you had set an error budget of two missed weeks per quarter, you would see that you are well within tolerance. Without the budget, every miss feels like a crisis. With the budget, you have a metric that separates signal from noise: you act only when accumulated misses cross the threshold you defined in advance.

Try this: Pick one system you operate — a creative practice, a fitness routine, a team process, a communication habit. Define three things: (1) the ideal behavior, (2) the minimum acceptable behavior, and (3) how many deviations from ideal you will tolerate per month before triggering a review. Write these down as a single sentence: 'I expect [ideal], I accept [minimum], and I investigate when [threshold] is crossed in [time window].' You now have an error budget. Run it for two weeks and observe whether having an explicit tolerance changes how you respond to individual failures.