Theory of constraints and continuous improvement
Continuous improvement offers a structured approach to achieving product goals.
It’s based on Godratt’s Theory of constraints which says that every goal has one biggest barrier. It probably has other barriers too, but it only has one biggest barrier. Identifying and removing that barrier has the biggest impact on achieving the goal. Once the biggest barrier has been removed, then the second biggest barrier becomes the biggest, and so on until the goal is as close to being achieved as it can be.
Often there comes a point where the gains from removing progressively smaller barriers are no longer worth the effort, and the product has reached maximum optimisation.
This approach to the continuous improvement of a product focuses on solving the biggest problems first.