[troupe]

> if something doesn't work then change it.

And especially if you change something, make sure you have someway to know if you made it worse and need to go back to what you had before.

[happymellon]

This is true, measurement is important and if it is worse can you tell if the original bad part improved and look at a hybrid of actions, however the ability to change in the first place is always lacking with people who say that Agile doesn't work.