People will judge a company or restaurant or whatever more favourably if they correct a mistake to their satisfaction, rather than not making mistakes at all.

It’s makes me wonder how many companies are hacking this. Don’t worry about quality past a certain point. Say everything works 95% of the time. After that, just offer a generous returns policy, eg just replace the whole thing. Probability that 2 things are broken is very small, and you just made the customer think you’re better than you are, and it’s cheaper than improving QC. Everyone perceives you to be better than the company with no mistakes. Profit.