1. When waterfall model being used?

1) This model is used only when the requirements are very well known, clear and fixed.
2) Product definition is stable.
3) Technology is understood.
4) There are no ambiguous requirements
5) Ample resources with required expertise are available freely
6) The project is short.

2. Where waterfall method is suitable for SDLC?

1) In development of database-related software, eg commercial projects.
2) In development of E-commerce website or portal.
3) In Development of network protocol software.

3. Explain waterfall methodology?

The waterfall approach is the earliest approach that was used for software development. Initially, most projects followed the waterfall approach because they did not focus on changing requirements.

4. Explain waterfall model application?

Every software developed is different and requires a suitable SDLC approach to be followed based on the internal and external factors. Some situations where the use of Waterfall model is most appropriate are:
1) Requirements are very well documented, clear and fixed.
2) Product definition is stable.
3) Technology is understood and is not dynamic.
4) There are no ambiguous requirements.
5) Ample resources with required expertise are available to support the product.
6) The project is short.

5. What is maintenance in waterfall model design?

There are some issues which come up in the client environment. To fix those issues patches are released. Also to enhance the product some better versions are released. Maintenance is done to deliver these changes in the customer environment.

6. What is deployment of system in waterfall model design?

Once the functional and non functional testing is done, the product is deployed in the customer environment or released into the market.

7. What is integration and testing in waterfall model design?

All the units developed in the implementation phase are integrated into a system after testing of each unit. Post integration the entire system is tested for any faults and failures.

8. What is implementation in waterfall model design?

With inputs from system design, the system is first developed in small programs called units, which are integrated in the next phase. Each unit is developed and tested for its functionality which is referred to as Unit Testing.

9. What is system design in waterfall model?

The requirement specifications from first phase are studied in this phase and system design is prepared. System Design helps in specifying hardware and system requirements and also helps in defining overall system architecture.

10. What is requirement gathering and analysis in waterfall model design?

All possible requirements of the system to be developed are captured in this phase and documented in a requirement specification doc.

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