What is a test model in software testing?
A test models is used to describe the sequence of activities that make a Systems Development Life Cycle (SDLC). SDLC is used to describe activities of both development and maintenance work in Software Testing. Software testers can use various test models such as waterfall, iterative and agile styles while performing software testing. A brief description of various test modals is as follows:A. Waterfall style modal TestingThe Waterfall Model approach is most basic life cycle model and is divided into following phases:- Requirement Gathering & Analysis phase- Software Design- Implementation and Testing- MaintenanceSoftware testing using waterfall style is a linear process like software development using the waterfall model. Waterfall testing is occasionally appropriate for situations where it is reasonable to hope that software would work, for example applying a patch to a production application.B. Iterative style modal TestingIterative testing is similar to iterative development in the way that many of the test iterations happen to coincide with development releases. Testing iterations differ from development iterations in that there can be iterations prior to the first software build, and there can be multiple test iterations during a single software build. Due to many variants, Iterative software testing is extremely common in software testing companies. Iterative testing generally works well on following projects:- where software is being developed in pre-planned, predictable increments- where the software is being developed and released in such rapid or unpredictable cycles that it is counter productive for testers to plan around scheduled releases.C. Agile style modal TestingIn QA testing companies, Agile style testing more or less eliminates the element of pre-determined flow from the test cycle. For example, while analyzing the results of a test, the tester may realize that test was flawed and move directly back to planning and designing tests. In a waterfall or iterative flow, that test redesign would wait until after the current results were reported and preparations were being made for the next test iteration. For example, within an iterative test approach, a tester could be encouraged to enter a period of agile testing side-by-side with a developer, while tracking down and resolving defects in a particular feature.Hope this information is clear to you and get back to us in case need more information.