Aim for 85% effort.

In the workplace, but also it probably applies wider.

• Leave space for emergencies
• Avoid burnout
• Recover between exertions
• Finish meetings early
• Hard stop at end of office day
• Lead by example

https://hbr.org/2023/06/to-build-a-top-performing-team-ask-for-85-effort

To do: read up on lean manufacturing, which has similar ideas.

Also Don Reinertsen's work on lean 2.0

Also queueing theory, optimum utilisation