It is inevitable for any successful IT industry not to estimate the effort, cost, and duration of their projects. As evident
by Standish group chaos manifesto that approx 43% of the projects are often delivered late and entered crises because of over
budget and less required functions. Improper and inaccurate estimation of software projects leads to a failure, and therefore it
must be considered in true letter and spirit. When Agile principle-based process models (e.g. Scrum) came into the market, a
significant change can be seen.