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  Prototyping

Introduction to Prototyping

Prototyping is another method that can be used for problem analysis which is getting a lot of attention now days. It takes a very different approach analysis to conceptual modelling based approaches structured analysis object oriented modelling. In prototyping a partial system is constructed as a partial result of the communication of requirement between the users and the analysis. The prototyping helps to the clients, users and development to gain a better understanding of the problem and the needs. Prototyping is frequently used to provide early feedback to customer and users and to improve communication of requirements between the analysis and the users. Many users find it difficult to visualize how the software product will perform in their environment if they have only a document which describes the requirement. A prototyping effectively provide the users a look and feel and convey a sense of how the system will work.

The idea behind prototyping is that client and the users can assess their needs much better if they can see the working of a system even the system in only a partial system. Prototyping emphasized that actual practical experience is the best aid for understanding needs. By actually experimenting with a system people can say I do not want this feature or I wish it had this feature or this is wonderful.

Hence such actual experience with a prototyping that implements part of the software is used to analyze the problem and understand the requirement for the software. A software prototyping can be defined as a partial implementation of a system whose purpose is to learn something about the problem being solved or the solution approach.

Boar justifies the prototyping  technique in this way most currently recommended  methods for defining  business system  requirements are designed  to establish a final complete, consistent, and  correct set of requirements before the system is designed constructed, seen or experienced by the  user. Common and recurring industry experience indicates that despite the use of rigorous industry in many cases users still reject applications as neither correct nor complete upon completion. Consequently expensive time consuming and divisive rework is required to harmonize the original specification with the definitive test of actual operational needs. N the worst case rather than retrofit the delivered system it is abandoned. Developers may build and test against the specification but users accept or reject against current and actual operational realities.

In many cases, development of a prototype possibly coupled with systematic analysis methods, is an effective approach to software engineering.

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