Software requirements analysis is a systematic analysis and assumption of what kind of software to develop. It is a process of removing the rough and selecting the fine, removing the false and retaining the true, correctly understanding the user's requirements, and then expressing them in software engineering development language (formal functional specification, that is, requirement specification). The basic task of this stage is to determine the problems to be solved with the users, establish the logical model of the software, write the requirements specification document, and finally get the approval of the users. The main methods of requirement analysis are structured method, data flow chart and data dictionary.
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