"An ounce of prevention is worth a pound of cure." — English Proverb
Generally the most effective way to achieve quality is to avoid having defects in the first place. It is much less costly to prevent a problem from ever happening than it is to find and correct the problem after it has occurred. Focusing on prevention activities whose purpose is to reduce the number of defects is better. Companies employ many techniques to prevent defects for example statistical process control, quality engineering, training, and a variety of tools from the Lean and Six Sigma tool kit.
Seek to prevent problems and waste, rather than to inspect and fix. Shift the emphasis from failure and appraisal to prevention. Inspecting the process, not the product, is prevention. Use poka yoke to mistake proof process errors.
Although it’s generally understood that it costs more to deal with crises than to prevent them, many companies do not recognize and reward those who push past the symptoms to the root causes, preventing future occurrences. If you want to focus on prevention, be sure to reward those who do it successfully.