The importance of requirements analysis in software development

Software requirements analysis is particularly important. For a long time in the history of software engineering, requirements analysis was considered a simple step in the overall software engineering process, but over the past decade or so, more and more people have recognized it as the most critical process in the whole process. It is only through software requirements analysis that the general concept of software functionality and performance can be described as specific software requirements specifications, thus laying the foundation for software development.

The failure of many large-scale application systems is ultimately attributed to the failure of requirements analysis: either the method of obtaining requirements is improper, which makes the requirements analysis inadequate or incomplete, resulting in developers repeatedly conducting requirements analysis, resulting in the failure of design, coding, and testing; Either the customer does not cooperate well, resulting in the customer not confirming the demand, or the customer demand is constantly changing, which also makes the design, coding, and testing unable to proceed smoothly. Refer to the article.

Requirement analysis can make development and testing more able to understand customer needs, put forward some technical difficulties and possible difficult problems, solve them as soon as possible, and reach consistency, which is convenient for future development and testing.

Requirements analysis is all about analyzing what the needs of software users are. If a lot of manpower, material resources, financial resources, and time are invested, and no one wants the software developed, then all the investment is in vain. If you put a lot of effort into developing a piece of software, but in the end it doesn't meet the user's requirements, so you have to redevelop it, this kind of rework is painful.

For example, if a user needs a software for linux, and you ignore the running environment of the software in the early stage of software development, forget to ask the user this question, and take it for granted that it is for development

Windows software, when you have worked hard to complete the development and submit to the user, only to find out that there is a problem, at that time you want to cry without tears, and you can't wait to find a piece of tofu and hit your head to death.

Requirements analysis is important because it has a decision-making, directional, and strategic role, and it plays a pivotal role in the process of software development. Everyone must pay enough attention to the needs analysis. In the development of a large software system, his role is far greater than programming.

1) The driver software supports the hardware to be used under the system.

2) The system software is responsible for managing the computer system.

so that they can work in harmony. System software enables computer users and other software to treat the computer as a whole, regardless of how each piece of underlying hardware works.

3) Supporting software is the software that supports the development and maintenance of various software, also known as software development environment (SDE). It mainly includes an environment database, various interface software, and tool sets.

4) Application software is software that is developed for a specific purpose. It can be a specific program, such as an image browser. It can also be a collection of programs that are closely related and can work with each other, such as Microsoft.

Office software. It can also be a large software system consisting of many independent programs, such as a database management system.

5) Software (Chinese mainland and Hong Kong language, called software in Taiwan, English: software) is a collection of computer data and instructions organized in a specific order. Generally speaking, software is divided into system software, application and middleware in between.

Software does not simply include computer programs that can run on a computer (in this case, a computer in a broad sense).

Silverridge's documentation relating to these computer programs is generally considered to be part of the software. The simple stupid source is that software is a collection of programs and documents.

The company's information construction and software development, application software development is the tool for its enterprise development, but its purpose is to help the poor customers to achieve their desired business purposes. In the process of application software development, it is common for customers to have a good understanding of their own business processes, but they are not familiar enough with the characteristics of software operation, especially at the beginning, the implementation process and results are not expected to be clear. However, the general application software development company is not familiar with the enterprise business process enough, and is not fully familiar with and checked in the pre-planning and demand analysis stage of the project, so even if the software development technology is mastered well, it may lead to the failure of the project.

Therefore, as an application software development company, the most important part of the success of the project should be the upfront requirements analysis, first of all, learning from the customer, fully understanding the user's business process, and deeply understanding the business goals that the customer wants the project to achieve. Consulting and analysis around these premises, Youshu finds the right entry point and development direction. At the same time, there are also complex issues such as fully considering the existing actual situation of users, existing application systems, acceptance of employees or users, ease of use, long-term business goals, long-term information planning, and consistency with higher-level authorities.

Application Software Development Process:

The entire application software development process can be roughly divided into five major stages, namely: software requirements, software design, software code, software testing, and software delivery.

Software Development Requirements Analysis Phase:

a. Before the company does a project, it will first communicate with customers, what is the purpose of communicating with customers? It is to understand the needs of users and make the basic functions to be realized by a software according to the needs of customers, which is also called customer demand analysis. This step is very important in the whole software development process, and if you don't even know the most basic needs of the customer, then your software will not be able to satisfy the customer.

B: The relevant requirements analyst has a preliminary understanding of the requirements from the user, lists the major functional modules of the software development project, what are the small functional modules of each large functional module, and preliminarily defines a small number of interfaces for the functions that the customer has clear needs.

C: A functional requirements document based on your own experience and needs. This document will clearly use the general functional modules of the system, what are the small functional modules of the large functional modules, and also list the relevant interfaces and interface functions.

d: The system analyst reconfirms the requirements to the user.

Summary: Clarify your own needs first, which plays a decisive role in the time, difficulty, and cost of developing application software!

Innovation Dreams:

A software development project usually goes through several major stages such as requirements analysis, design, programming, and testing. Among them, the design includes the overall design, system design (turning the overall architecture into a block system), and detailed design.

After the detailed design, the software becomes a block of modules, which then goes into programming. A software development project usually goes through several major stages such as requirements analysis, design, programming, and testing. Among them, the design includes the overall design, system design (turning the overall architecture into a block system), and detailed design.

After the detailed design, the software becomes a block module, and then it enters the hole making and guessing process.

When it comes to the programming stage, the final job is left to coding software blue-collar modules, which in India is usually filled by vocational graduates with one or two years of training.

The final testing of software is a complex process - there are single judgment element testing (small module testing), system testing (block-to-block connection and integration), and overall functional testing.

During this period, the test programming engineer writes the test tools and formulates the test rules, which is no less difficult than the formulation of the system framework. Finally, the test engineer completes the test task.

Software development is the process of building a software system or a software part of a system according to user requirements. Software development is a system engineering that includes requirements capture car formwork, requirements analysis, design, implementation, and testing.

Software requirements analysis is to refine and refine the software feasibility analysis established during the software planning period, analyze various possible solutions, and assign them to each software element. Requirements analysis is the final step in the software-defined phase and is to determine what the system must do, i.e., to set out complete, accurate, clear, and specific requirements for the target system. Shenyunfan describes the functions and performance of the software, determines the constraints of the software design and the interface details between the software and other system elements, defines other effective requirements of the software, and derives the logical model of the target system with the help of the logic model of the current system, so as to solve the problem of "what to do" of the target system.

Requirements analysis can be divided into three stages: demand proposal, demand description and demand review.

Hello Dear, I am glad to answer for you: The answer is: Dear Software requirements analysis plays a pivotal role in the software development process, and it is an important guarantee for the development of correct and high-quality software systems.

There are data showing that it takes 100 times more effort or work to correct an error in the requirements analysis phase than it does to correct an error in the testing phase. The main process of software requirements analysis and guessing: obtaining user requirements, analyzing user requirements, writing requirements documents, and conducting requirements review.

On the one hand, the requirements analysis takes the system specification and project planning as the basic starting point of the analysis activities, and checks and adjusts them from the perspective of software. On the other hand, the requirements specification is the main basis for software design, implementation, testing, and maintenance. Good analysis activities help to avoid or eliminate early errors, which can lead to increased software productivity, lower development costs, and improved software quality.