Fast prototype method
Xue Jinsong, Haibin
(This article is reproduced from Software Engineering Expert Network www.21cmm.com)
Rapid prototyping rapid prototype method is a computer-based system development method in recent years. It first constructs a simple prototype system, and then gradually refine the prototype system, continuous expansion and improvement Software system. The prototype is the model, and the prototype system is the model of the application system. It is a reduced scale model of the actual system to be constructed, but most of the performance of the actual system is retained. This model can be checked, tested, modified in operation until its performance reaches user needs. Therefore, this working model will soon be converted into the original target system.
Three levels of prototype
The first layer includes online screen activity, the purpose of this layer is to determine the layout and content of the screen and the report, the order of screen activity, and the screen version of the screen.
The second layer is the extension of the first layer, references the interaction of the database and data operation, the main purpose of this layer is to demonstrate the operation of the system key area, and the user can enter a group of transaction data, execute the simulation process of these data. Includes errors handling;
The third layer is the working model of the system. It is a subset of the system. The logical transaction and database of the application can be operated with actual data. The purpose of this layer is to develop a model to develop into ultimate. System scale.
The main advantage of the prototype method is that it is a method that supports the user, so that users play a positive role in the design phase of the system living cycle; it can reduce the risk of system development, especially in the development of large projects, due to projects The analysis of demand is difficult to complete, and the application prototype method is more obvious. The concept of prototype is applied to both systematic re-development, but also to system modification; prototype method is not limited to design only on computer in the development project, the third layer prototype method is used to make system work models . The rapid prototype is successful, requiring support for a good development environment / tool such as the fourth generation language (4GL). The prototype method can be used in combination with traditional lifecycle methods, which will expand the activities of users to participate in demand analysis, preliminary design and detailed design, and deepen the understanding of the system. In recent years, the thoughts of rapid prototyping methods have been applied to the development activities of products.
