You will see that the child does not change, therefore and at you will not continue work.
The child will understand, that the plan to you is not important, and will put less efforts, coming back to old behavior model.
Therefore plan occupations for that time when are able to check about tsess.
Coherence of actions of adults at application of the plan.
If other parent, the senior brother sister or the teacher will accept participation in implementation of the plan or its some part, they have to to adhere to rules..