Whats the Spiral Model? Advantages and Disadvantages (Blog)

Spiral Model is the combination of both sequential model and prototype model. The spiral model is specifically designed for projects which are huge in size and requires regular enhancements. The spiral model is somewhat similar to the incremental model but more emphasis on risk analysis, engineering, and evaluation.

Phases involved in Spiral ModelPlanning phase: All the required information about the project will be gathered in this phase. Requirements such as BRS (business requirement specification and SRS (system requirement specifications), design alteration, etc. will be done in this phase.

Cost estimation, scheduling the resources for iteration, etc. also happens in this phase. Risk Analysis: Requirements of the project is studied and brainstorm sessions are conducted to figure out potential risks involved.

Once the risk has been identified proper strategies and risk mitigation methodologies will be planned.Testing phase: testing alongside developmental changes will be done in this phase. Coding, test case development, test execution, test summary report, defect report generation, etc.

happens in this phase.Evaluation phase: Customer can evaluate the tests and can give feedback before the project goes to the next level1st iteration activities such as panning, initial risk analysis, engineering evaluation, requirement gathering happens.2nd iteration higher level planning, detailed risk analysis, evaluation happens in this phaseAlso Read: 50 Funny Programming Memes for Software Testers3rd iteration Testing related activities such as coding, tool selection, resource allocation, which test to choose?

Etc. happens in this phase. 4th iteration In this customer is the key where they can evaluate the entire process and express their option regarding it.

When to use the spiral model?When cost and risk is highMedium to high-risk projectFrequent release requirementComplex projectProjects that require constant changeNot feasible long term projects owing to the change in economic prioritiesAdvantages and disadvantages of V modelAdvantagesRisk management is easy in this type of model. When you are handling expensive and complex projects, risk management is a must.

Moreover, Spiral model has the ability to make any software testing project transparent.Customer can see and review the test and different stagesProjects can be separated into various parts to ease the management difficultyDocumentation control is strong in this type of methodologyProject estimate will tend to be more realistic as it progresses.DisadvantagesCannot be used for small projects as it can be expensiveA vast amount of documentation owing to several intermediate stagesThe end date of the project cannot be calculated at the early stages of the projectComplex processHigh expertise is required to run the modelConclusionEach spiral that can be seen in the diagram above acts as a loop for a separate process in testing.

the four main activities, planning risk analysis, testing, coding and project evaluation will be repeated again for the required amount of phases for any project.Also Read: What is V-model and W-model in Software TestingImplementation of the model requires personnel who are highly experienced in it since the Spiral model is exclusively meant for larger products and risk analysis the most important feature RELATED QUESTION What are some natural face masks to reduce acne scars? Hi there, here are some natural face masks thatI recommend:Aloe vera: Its leaves contain plant extracts with incredible regenerative powers.

Their benefits to our skin are well known, particularly to treat and eliminate stretch marks, burns and acne pimples. Just take at least a teaspoon of pulp of aloe and apply on the scars, then let stand for 30 minutes before rinsing with warm water. Baking soda: Baking soda has an exfoliating effect that acts on small scars, which makes it ideal for acne.

Simply wet the face and apply a pinch of baking for a few seconds on the scars, then rinse with warm water. Do not abuse this remedy: applying once a week is more than enough, because the bicarbonate can damage sensitive skin. Lemon: Perfect for skin whitening.

You can use it before going to sleep, by soaking a cotton juice lemon and applying it on the spots for about fifteen minutes. It is very important not to expose yourself to the sun with this remedy. Always do this at night.

Honey: regenerating and softening. In case of oily skin, for example, you can mix it with egg yolk to make a kind of mask, which is ideal for removing scars. Apply honey on the scars and let it sit 20 minutes before rinsing thoroughly.

Tomato: It has exfoliating properties and is rich in beta-carotene, making it an ideal fruit for the care of our skin. Cut some thin slices and leave them on your face for about ten minutes. If you have a little more time before you, you can also make a tonic made from juice tomato and cucumber: to do this, mix tomato and half a cucumber until it becomes liquid.

Then just moisten a cotton ball with this mixture and apply it on the affected areas.Hope this helps!