Vinay,
The simplest and most practical way for you is to get a copy of the standard Job Anaylsis Questionnaire. If you have this tool, then it will be easy for you to do JA even if it will be required every month.
My company has designed and copyrighted an internationally usable JA tool (questionnaire and form). We sell it.
If interested, please call me directly: 0632-776-8537 or 063-916-762-7218.
Best wishes.
Ed Llarena, Jr.
Managing Partner
Emilla Consulting