As mentioned in Step 3, we recommend that you take an experimental approach to the activities/initiatives/changes you try out, in the sense that you test, evaluate and adjust them.
As a manager, it is your responsibility to ensure that the activities/initiatives are followed up on. You have overall responsibility for maintaining focus and ensuring that follow-ups and evaluations are carried out, but you may allocate or delegate specific responsibilities and roles to others. The most important thing is to decide who should follow up, how, and how often – and to ensure that all the people involved feel empowered and able to do a good job, with you helping them to maintain focus.