One of the reasons why projects fail could also be luck of motivation. There are various ways to motivate a PM or the team. One very important according to me, is letting the people have an amount of autonomy in choosing their way of work.
If the ‘what’ question is clear, it a great to know that you can freely decide ‘how’ methods to apply.
This works at best in creative teams but is also very good elsewhere. Creative workers find it easier to do mental work on their projects while hearing music, being on places outside the office walls, when visiting museums, or shopping moles, by taking a coffee at the coffee shop around the corner, go for a jog etc.
A programmer on the other hand, needs his machine, his code and may find it easier to concentrate in the silence of his office.
There are so many different working habits and ways. Not everyone enjoys company when thinking. Different people work differently well while using the same set of hardware or software tools. Why should a company or a PM try to force a specific one? It would not rise effectivity, it will probably lead to unease.
My suggestion: Do you want to rise effectivity and make your deadlines on a project? Be courageous and offer autonomy to your team to decide for their own how they organise their work.