Should agile teams estimate defects?
This a one question that teams often find themselves debate and my perspectives has changed over the years on this. The short answer is … it depends on your team context and what you are trying to achieve with estimation.
Estimation is a practice that helps Agile Teams forecast the effort that is required to get a task done e.g. deliver a feature and as such, it contributes to capacity planning for the team. This implies that would be impossible for a Scrum Team to forecast how much work it can complete within a sprint if the Product Backlog Items are not estimated.