Disadvantages of Waterfall Model

(Q). Disadvantages of Waterfall Model

Waterfall Model is first software model. It is also referred to as a linear-sequential life cycle model.  It is very simple to understand and use.  In a waterfall model, each phase must be completed fully before the next phase can begin. This type of software development model is basically used for the project which is small and there are no uncertain requirements.
There are many disadvantages of waterfall model i.e.

• Once an application is in the testing stage, it is very difficult to go back and change something that was not well-thought out in the concept stage.
• In this model client can not communicate directly with all team members.
• High amounts of risk and uncertainty.
• Not a good model for complex and object-oriented projects.
• Poor model for long and ongoing projects.
• Small changes or errors that arise in the completed software may cause a lot of problems.
• The software is ready only after the last stage is over

Software Development Models

Waterfall Model

Agile Model

Iterative Model

Spiral Model

Defect Management

How a defect is managed in a team?

Discovery: Test teams have to discover as many defects as possible, before the end customer can discover it.

Categorization: Defect categorization help the software developers to prioritize their tasks. That means that this kind of priority helps the developers in fixing those defects first that are highly crucial.

Resolution: Once the defects are accepted and categorized, developers work on the fix and deploy it to the test environment on scheduled time

Verification: After the development team fixed and reported the defect, the testing team verifies that the defects are actually resolved.

Closure:  Once a defect has been resolved and verified, the defect is changed status as closed . If not, you have send a notice to the development to check the defect again.

Reporting:  The management board has right to know the defect status. They must understand the defect management process to support you in this project. Therefore, you must report them the current defect situation to get feedback from them.