What experience do you have (or have heard about) where poor job analysis impacted employees?
A poor job analysis that negatively impacts employees might include:
a) inadequate description of the duties
b) prejudicial judgment of the employee's work
c) poor training of the employee
The question asks what experience you've had or heard about. This should be as specific as possible.
This site may give you some ideas.
http://en.wikipedia.org/wiki/Job_analysis