Roger Swannell – Getting agile governance right:

In a traditional waterfall or stage-gated development process quality assurance and approval checks happen towards the end of the work. It makes sense if you’re optimising for efficiency as all the quality check governance happens when the development is as close to it’s live and finished state as possible. But it’s based on the assumption that it’s possible to know ahead of the development work all the possible considerations and implications, which approval checks can refer to and confirm met or not.

The agile perspective is that its not possible to know all those implications ahead of doing the development work and so the better approach is to get smaller feedback more regularly and respond to it more quickly. This is better than waiting until near the end because changes are easier to make whilst development work is in progress. This approach optimises for effectiveness where getting it right is more important than doing it quickly.