There are a number of objectives for performing task analysis -- one of which is: To identify all facets of a task (assumptions, starting point, ending point, knowledge/ability necessary, steps, completion criteria, etc.) that can be used to build a training program for replacement workers and/or continuous training to ensure performance is maintained at a minimum level.

because it does

it is a program of performance

Can't performance the task or mission.

if your teacher gives you a textbook or an assignment