When people are required to change behavior, take on new ideas, activities or processes, their degree of change is influenced by two main criteria – motivation to change and ability to change. Put crudely:- 20% will change and find it easy – great! 30% would find it easy enough but don’t want to change.They need push and pull encouragement or counselling. 30% would be willing to change but they find it difficult – they need coaching. 20% just won’t change and probably couldn't anyway.