Why is it important for the people doing the work to participate in the SHINE step?

[answerhappygod]

If they don't do a good job, they can only blame themselves
They are responsible for keeping their workplace in order
Nobody likes cleaning, so the people who are doing the work will come up with innovative ways to prevent making the mess
They have extra time now that the have organized the workplace
Reinforces what happens when people use bad work practices