Mental activities performed on the job and the knowledge, skill, ability and other characteristics (KSAOs) are not all directly observable.
Job analysis has been used frequently for various occupations. However it may ignore the changing context and situations within which a job incumbent works. This applies in particular to management positions.
Bias may occur in the process of data collection.
In large organizations, it is found that traditional definitions of managerial roles do not hold true.
As jobs increasingly change, less value may be attributed to the need to gather job analysis data. (Karen, 2000)
Those carrying out job analysis do not always possess the appropriate skills and have not always undergone the necessary training to do the job properly.