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Prototyping

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Prototyping is a system development method(SDM) in which a prototype is built, tested and then reworked as necessary until an acceptable prototype is finally achieved, from which the complete system ...

Prototyping is a system development method(SDM) in which a prototype is built, tested and then reworked as necessary until an acceptable prototype is finally achieved, from which the complete system can be developed.

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    Prototyping Prototyping Presentation Transcript

    • welcome PROTOTYPING RAISON SAM RAJU Department of Commerce University of kerala raisonsamraju@yahoo.com 1
    • overview PROTOTYPING • • • • • • INTRODUCTION MEANING STEPS ADVANTAGES DISADVANTAGES CONCLUSION raisonsamraju@yahoo.com 2
    • INTRODUCTION Information system is a system for accepting data as raw material and through one or more transaction process generating information as a product. as information system has grown progressively more complex ,the development cycle has lengthened. for solving complexities and attaining objective system builders developed various methodologies for system development. one such methodology is called prototyping raisonsamraju@yahoo.com 3
    • PROTOTYPING Meaning Prototyping is a system development method(SDM) in which a prototype is built, tested and then reworked as necessary until an acceptable prototype is finally achieved, from which the complete system can be developed. PROTOTYPE Prototype is a preliminary working version of an information system for demonstration and evaluation purpose. Or It is an early approximation of a final system. ITERATION Iteration means the act of repeating a process or steps to build a system with the aim of approachingraisonsamraju@yahoo.com a desired goal, target or result. 4
    • STEPS IN PROTYPING STEP 1:Identify the user’s basic information requirements User articulates his or her basic needs in terms of output from the user. the designer responsibility is to establish realistic user expectation and estimate the cost of developing an operational prototype. STEP 2:develope the initial prototype system Objective is to build a functional interactive system that meets user basic stated information requirements STEP 3:use of prototype system to refine user requirements The initially developed prototype is delivered to the user to identify further refinements/changes required in the prototype. STEP 4:Revice and enhance the prototype Designer makes necessary changes pointed out by user.step2 &3 are iterative. raisonsamraju@yahoo.com 5
    • STEPS IN PROTYPING Operational prototype: the most functional kind of prototype and may evolve into the final product raisonsamraju@yahoo.com 6
    • Advantages Ability to ‘try out’ ideas without incurring large cost. Lower overall development costs when requirement change frequently. The ability to get functioning system into the hands of the user quickly. Reduced application development time to achieve a functioning system. Information system can be developed more efficiently and effectively. Prototyping is especially valuable for the design of the end-user interface of an information system. Helps to determine technical feasibility raisonsamraju@yahoo.com 7
    • Disadvantages 1.Iterative nature: prototypes requires at least 2 iterations. It may become an unending process of refinement, which may take too much time ,money and effort. 2.Prototypes are usually not complete system and there is a great temptations for most developers to create a prototype and stick to it even though it has flaws. 3.Due to frequent changes ,management of the development process also becomes difficult. 4.Time consuming model and slow process. raisonsamraju@yahoo.com 8
    • CONCLUSION Prototyping is the process of building an experimental system that demonstrates the features of a proposed system for end users to evaluvate.by interacting with the prototype user can get better idea of their information requirements. the prototype endorsed by the user can be used as a template to create the final system. it is an iterative, trial-and-error process that takes place between the developers and users. there are 4 steps in the process of prototyping. raisonsamraju@yahoo.com 9