(Solved Homework): WK10 requirements 1. 2 initial discussion posts, due bv Sundav June 4.2017

WK10 requirements 1. 2 initial discussion posts, due bv Sundav June 4.2017

WK10 requirements 1. 2 initial discussion posts, due bv Sundav June 4.2017

Expert Answer

 Waterfall model : It is a step by step sequential design process.It consists of 8 major steps namesly conception, initiation, analysis, design, construction, testing, implementation, and maintenance. Once, a step has been performed the developers cannot go back to any previous step and hence a well defined plan is necessary.

Agile model : It follows an incremental approach instead of a sequential one to overcome the drawbacks of Waterfall. Developer work on small modular project teams and the work is carried out in weekly or monthly sprints. After each spring, the project priorities are evalauted and tests are run to see the working demo and get the customer feedback.

Waterfall model :

Merits Demerits
Meticulous documentation and record keeping Once a step has been taken, cannot go back. You have to start the project from the beginning from the requirements phase.
Client knows what to expect including the time, cost and size of the project. Product is only tested at the end. So if bugs are encountered, their existence can highly impact the code written and a lot of things can go haywire.

Agile model :

Merits Demeirts
Changes can be made at each steps according to evolving client needs. An incompetent project manager can lead to a costly project crossing the deadline because of the high speed sprints required to be managed,
After each spring, a project prototype is developed which makes it easier to look for any changes if required by the client and cleaner bug fixes. Since initial project does not have a definite plan, the final product can grossly vary than what was initially intended.

Examples where you can use Waterfall model : Typically when requirements are not going to vary and the client has a clear picture of the product. Generally, companies which require to upgrade an existing product go for the waterfall model. Also, maintenance projects where client interaction is not required are allowed to follow waterfall model. Some organisations like US Department of Defense Software Systems strictly followed the waterfall model because of the strong documentation and concrete approach.

Examples where you can use Agile model : Fast incremental approach which requires client interaction. Being adopted by most of the product based comapnies. Early prototyping is possible which helps them to get customer feedback and enhance their product. Google, Microsoft, Salesforce as well most of the e-commerce startups and giants have adopted the agile methodolgy. Customer feedback and satisfaction being their major goal, rapid prototyping and bug fixes help them the grow better. Snapchat releases its beta after every spring for customers to review and suggest changes and this has largely help boost the revenue and ratings of the product.

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