Requirement analysis : Why it is important?

Requirement analysis is very crucial part in testing and it is core activity of the tester.
Tester need to understand the requirements clearly. If there is bigger requirement that need to be split in small requirements and need to be work on it.

The requirement has to be clear, readable, understandable, traceable, and measurable.

If we say requirement clear that mean there is no confusion .If we say readable that mean any non-technical person need to be understand requirement .There is no any unnecessary technical term and It is easy to understand.

The Requirement should be measurable that mean no any assumption .For e.g. take web application if user enter the search term then application need to response as soon as possible. Seeing this requirement we can’t understand what exactly it mean? "as soon as possible" .does it response in 1min,60 sec or in 30 sec ? so there is need to be a specific time in which we can measure the response.

Requirement should be traceable with different level that mean it can be traceable to design level, coding or Testing level.
When we say traceable in testing that mean each Requirement has their own testcase.That requirement need to be traceable to their respective test cases.

The Requirements are key factor for the tester.

Communication is more important, if you do not understand any requirement ask the question until you understand requirements clearly.

Change in requirement: sometimes it happens the requirement get change so in that case it has to be defined process for receiving the new requirement and Ensure that the new requirement request is it approval from all stakeholder.