For change to happen, people and teams need two things: the capability to carry out the required action and the desire to do so. Capability reflects many aspects such as knowledge and skills, as well as resources like time and money. Motivation can be intrinsic due to beliefs and attitudes or extrinsic due to instructions, incentives, penalties or social norms.
Capability and motivation are related. An easy-to-implement behaviour change (i.e. one for where the existing capability to act is high) will need much less motivation than a challenging behaviour change (i.e. one which requires lots of resources, time, effort, risk-taking, knowledge, etc).
Understanding the interrelationship between capability and motivation can dramatically increase the chance of success of our change programme.