需求分析特别重要。在软件工程的历史中，很长时间里人们一直认为在整个软件

Demand analysis is particularly important. In the history of software engineering, for a long time people have thought that a simple step in the entire software engineering is requirements analysis, but with the passage of time, the concept that it becomes the most critical one in the entire process has become more and more important. Many people realize. In order to describe the overall concept of software functions and performance as specific software requirements specifications, only the use of software requirements analysis can lay the foundation for later software development. Many facts show that when many failed large-scale application systems are analyzing the reasons, they will suddenly find that everything is caused by failed requirements analysis: incomplete or imperfect requirements analysis is due to improper use of requirements analysis methods, This makes it necessary to continuously repeat the analysis of requirements in development, and also makes it impossible for the design, coding, testing and other links to proceed smoothly; the poor cooperation between the customer and us leads to the customer's unclear understanding of the needs, and the changing needs of the customers are also unable to Smoothly proceed with design, coding, testing and other links.

Requirements analysis is particularly important. In the history of software engineering, it has long been thought that a simple step in the whole software engineering is requirements analysis, but over time, it became the most critical concept in the whole process is recognized by more and more people. In order for the overall concept of software functionality and performance to be described as a specific specification of software requirements, only the use of software requirements analysis can also lay the foundation for later software development. Many facts show that when many failed large-scale applications in the analysis of the reasons, suddenly will find that everything is caused by failed demand analysis: incomplete or imperfect demand analysis, due to the improper use of the method of requirements analysis, so that the development of this need to repeat the analysis of requirements, but also make the design, coding, testing and other links can not proceed smoothly; Coding, testing, etc.

Demand analysis is particularly important. In the history of software engineering, for a long time, people have always thought that a simple step in the whole software engineering is requirement analysis, but with the passage of time, the idea that it has become the most critical one in the whole process has been recognized by more and more people. In order to describe the overall concept of software function and performance as specific software requirements specification, only by using software requirements analysis, can it lay the foundation for later software development. Many facts show that when a lot of failed large-scale application systems are analyzing the reasons, they suddenly find that everything is caused by the failed requirements analysis: incomplete or imperfect requirements analysis is attributed to the improper use of requirements analysis methods, which makes the development need to repeatedly analyze the requirements, and also makes the design, coding, testing and other links unable to go smoothly The customer's poor cooperation with us leads to the customer's unclear understanding of the requirements, and the customer's constantly changing needs can not smoothly carry out the design, coding, testing and other links.<br>