When to use
I also use it to assess the level of motivation to reach a goal. From my experience, coachees with a commitment of less than 8/10 usually require further exploration to establish underlying issues affecting their motivation and to establish what action they will be more committed to.
How to use it?
It can be for example (in the simplest form): On a scale of 1 -10…
…to what extent have you made progress towards this goal?
…how content are you in this area?
…how committed are you to taking this action?
This then allows the coachee to assess their position and gives a foundation on which to move forward.