Hardwiring Happiness is a psychology/but actually mostly a self-help book. I obviously went into it with expectations that weren't met, but it's not all bad. I did get the psychological research that I wanted and more.
The Work Plan describes the primary objectives and provides for each review its internal identification code and the year in which we expect one or more reports to be issued as a result of the review. When reports are issued, they are posted to OIG's website.
The two are not related whatsoever. An action plan are mainly for employees to enhance their performance and work habits while working on a project. Action plans are usually written by direct supervisors. A project plan is a formal document that will guide the project through its execution and control.