I think those defects often come about because the rest of the process emphasises schedule over quality. It’s a false economy, but many businesses treat quality

I think those defects often come about because the rest of the process emphasises schedule over quality. It’s a false economy, but many businesses treat quality as a cost rather than a benefit. It is again one of the problems with scrum. There is pressure to complete a feature in a given sprint - and a sense of failure if you don’t.