while ken appreciates that as a result of his communication based self improvement plan he will be a better person, knows that the greatest benefit will be to

Become a more effective worker

Explanation:

Every individual must plan and try to improve them self in order to be better person and an efficient worker. People should make as assessment of themselves and analyse where they are and they want to achieve in life and try to motivate themselves and improve their skills to achieve their dreams.

To be a better person and an effective worker, one should improve their communication skill which is considered to be important skill for an employee.

In the context, Ken makes a self improvement plan and works in his communication skill which will benefit him to become an effective worker as well as a better person.