Your SlideShare is downloading. ×
0
Prototype model
Prototype model
Prototype model
Prototype model
Prototype model
Prototype model
Prototype model
Prototype model
Prototype model
Prototype model
Prototype model
Upcoming SlideShare
Loading in...5
×

Thanks for flagging this SlideShare!

Oops! An error has occurred.

×
Saving this for later? Get the SlideShare app to save on your phone or tablet. Read anywhere, anytime – even offline.
Text the download link to your phone
Standard text messaging rates apply

Prototype model

35,927

Published on

Published in: Education, Technology
0 Comments
13 Likes
Statistics
Notes
  • Be the first to comment

No Downloads
Views
Total Views
35,927
On Slideshare
0
From Embeds
0
Number of Embeds
2
Actions
Shares
0
Downloads
1,133
Comments
0
Likes
13
Embeds 0
No embeds

Report content
Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
No notes for slide
  • figure
  • Transcript

    • 1.  PPT on Prototyping Model by - Krishna Bangwal
    • 2. Prototyping model The prototyping model requires that before carrying out the development of the actual software , a working prototype of the system should be built. A prototype is a toy implementation of the system. A prototype usually turns out to be a very crude version of the actual system , possibly exhibiting limited functional capabilities , low reliability , and inefficient performance as compared to the actual software. In many instances the client only has a general view of what is expected from the software product. In such a scenario where there is an absence of detailed information regarding the input to the system, the processing needs and the output requirements, the prototyping model may be employed.
    • 3. Requirements gathering Quick design PrototypeRefine requirements development incorporating Build prototypeCustomer suggestion Customer evaluation Of prototype Acceptance By customer Design Iterative development Implement Test Maintain
    • 4. Steps of Prototyping Model1) Requirements Gathering and Analysis: A prototyping model begins with requirements analysis , and the requirements of the system are defined in detail. The user is interviewed in order to know the requirements of the system.4) Quick Design: When requirements are know , a preliminary design or quick design for the system is created . It is not a detailed design , however , and includes the important aspects of the system, which gives an idea of the system to the user.• Build Prototype : Information gathering from quick design is modified to form a prototype . It represents a ’rough’ design of the required system.
    • 5. • Assessment or user evaluation: Next , the proposed system is presented to the user for consideration as part of the development process.3) Prototype Refinement: Once the user evaluates the prototype, it is refined according to the requirements .When the user is satisfied with the developed prototype , a final system is developed based on the final prototype.6) Engineer Product: The final system is thoroughly evaluated and tested followed by routine maintenance on a continuing basis to prevent large-scale failures and to minimize downtime .
    • 6. Advantages of Prototyping Model Provides a working model to the user early in the process , enabling early assessment and increasing user confidence. The developer gains experience and insight by developing a prototype , thereby resulting in better implementation of requirements. Helps in reducing risks associated with the project.
    • 7.  The prototyping model serves to clarify requirements , which are not clear , hence reducing ambiguity and improving communication between the developer and the user. There is a great involvement of users in software development . Hence , the requirement of the users are met to the greatest extent.
    • 8. Disadvantages of Prototyping Model If the user is not satisfied with the developed prototype, then a new prototype is developed . This process goes on until a perfect prototype evolves . Thus , this model is time consuming and expensive. The developer loses focus of the real purpose of prototype and compromises on the quality of the product . For example , he may apply some of the inefficient algorithms or inappropriate programming languages used in developing the prototype .
    • 9.  Prototyping can lead to false expectations. It often creates a situation where the user belives that the development of the system is finished when it is not. The primary goal of prototyping is rapid development. Thus , the design of the system may suffer as it is built in a series of layers without considering integration of all the other components.

    ×