How you Justify your position in particular role in a organisation?

By delivering the assignment in a way organization expected me to perform.

Aneesh,

First of all, one should have a firm belief that he is the most suitable for the particular role/position.

Analyse your past and previous experiences; recollect all your major achievements, honors and awards for the projects successfully accomplished and how you achieved, what are hurdles, resources and your personal strength,which helped to achieve those difficult goals.

Write the whole episode in a story format. Using the above material would help you to justfy, build your confidence, demostrate your passion and enthusiasm to better perform and value add to the particular role in future as well.