Reducing Uncertainty vs. Embracing Unpredictability
A blog post by Noel Wurst touches on the constant struggle between accepting changing plans and setting them in stone. What is the most 'agile' ratio between the two forces.
The post references to Martin Fowler and Elizibeth Scanlon Thomas articles in support of change acceptance, while Kefin Thompson is referenced as a supporter of significantly reduced uncertainty.
Have a look at the post for deeper insights from industry leaders on this question.