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What are the main steps of waterfall model in software development process?
1. Requirements collection and analysis: At this stage, communicate with customers and stakeholders to collect and analyze the requirements of software projects. This includes determining system functions, performance requirements, user interface design, etc.
2. System design: At this stage, the overall structure of the software system is designed according to the requirement specification. This includes defining system modules, data structures, algorithms, database design, etc.
3. Coding and unit testing: At this stage, according to the system design, coding is realized and unit testing is carried out. Developers write code according to the specified coding standard, and test each module to ensure the correctness of its function.
4. Integration and system testing: At this stage, all modules have been integrated and the whole system has been tested. This includes a comprehensive test of system function, performance and compatibility to ensure that the whole system meets the requirements.
5. Acceptance and delivery: At this stage, customers or end users conduct acceptance tests on the system to confirm whether the system meets the requirements and expectations. Once the system passes the acceptance test, it is delivered to the customer and put into use.
6. Operation and maintenance: After the system is delivered, the operation and maintenance of the system will be carried out. This includes the normal operation, fault repair and performance optimization of the system to ensure the stability and reliability of the system.
It should be noted that the waterfall model is a linear development model, and each stage is carried out in sequence, and the next stage can only be entered after completing one stage. This model is suitable for projects with stable demand and little change.
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