When Quality Decays

Designing anti-entropy systems to sustain excellence

During the last couple of decades working in quality, I’ve lost count of how many times I’ve seen the same pattern play out: A strong launch. Tight focus. Great early results. People doing the right things for the right reasons. Controls are followed. Issues are surfaced quickly. Leaders are engaged. The system works. And then—slowly—cracks in the armor begin to show.

A failure here. A miss there. At first, they seem isolated, even explainable. But over time, a pattern emerges—and when you look closely enough, you realize those failures all trace back to the same place: the basics.

Tool wear that went a little too long. Preventive maintenance that slipped. Checks that became routine instead of intentional. Shortcuts that felt harmless in the moment. Tribal knowledge used to stretch equipment and tolerances. Competing priorities pulling attention elsewhere.

Nothing dramatic. Nothing malicious. Just drift.

Eventually, you find yourself staring at what was once a best-in-class launch and asking the most uncomfortable question in quality:

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Comments

A great reminder

Quality decay is so significant that it begins immediately after we define what success looks like. Many people assume that once a solution is implemented, the problem will not resurface. In reality, the outcome is often only temporary. Verbal instructions fade from memory, work methods gradually drift, or people simply forget.

The author offers a thoughtful review of how these patterns emerge within human systems. When there are too many focus areas, attention becomes scattered and effectiveness declines. This is why it’s crucial to transform key practices into habits or automatic reflective actions.

However, we are constantly challenged by environments that demand small batches with high variety. This makes it difficult for teams to build consistent skills and develop the “muscle memory” needed to maintain quality over time.

Thanks for commenting

Percy, I appreciate this thoughtful reflection. You’re exactly right that quality decay begins the moment we step away from the solution. Without systems to reinforce the new way of working, drift is almost inevitable. Your point about small batches and high variety is especially relevant today. When repetition is low, we can’t rely on muscle memory alone. That’s where strong standard work, visual controls, and built-in process safeguards become essential. The system has to carry the discipline, not just the individual. Thanks for adding this perspective. It reinforces the core idea that excellence has to be continuously designed into the process.