If the Problem is understood in the right way then it should be<em> identified during the Analysis phase. </em>
Sometimes when we start solving the as <em>we proceed we land up</em> in the solution which is not suitable for the given solution and it has deviated.
This is something related to <em>the class lectures</em> where the lecturer starts at one place and land up somewhere as the children touch upon <em>question related to the topic and deviates out. </em>
<em>So all these aspects should be captured in the analysis phase.</em>