Time management is ruining your life.

And yet the truth is that more often than not, techniques designed to enhance one’s personal productivity seem to exacerbate the very anxieties they were meant to allay. The better you get at managing time, the less of it you feel that you have.

https://www.theguardian.com/technology/2016/dec/22/why-time-management-is-ruining-our-lives

Idle time needs to built into any system so you can do what you need to do.

In the accident and emergency department, by contrast, remaining “inefficient” in this sense is a matter of life and death. If there is an exclusive focus on using the staff’s time as efficiently as possible, the result will be a department too busy to accommodate unpredictable arrivals, which are the whole reason it exists.