spiral model is one of the most important software development life cycle models, which provides support for risk handling. each loop of the spiral is called a phase of the software development process. as the project manager dynamically determines the number of phases, so the project manager has an important role to develop a product using spiral model. each phase of spiral model is divided into four quadrants as shown in the above figure. the most important feature of the spiral model is handling these unknown risks after the project has started. the spiral model supports coping up with risks by providing the scope to build a prototype at every phase of the software development.
prototyping model also support risk handling, but the risks must be identified completely before the start of the development work of the project. in each phase of the spiral model, the features of the product dated and analyzed and the risks at that point of time are identified and are resolved through prototyping. the spiral model is called as a meta model because it subsumes all the other sdlc models. the spiral model uses the approach of prototyping model by building a prototype at the start of each phase as a risk handling technique. also, the spiral model can be considered as supporting the evolutionary model – the iterations along the spiral can be considered as evolutionary levels through which the complete system is built. get hold of all the important cs theory concepts for sde interviews with the cs theory course at a student-friendly price and become industry ready.
the major difference between these software process models waterfall and the spiral is that the waterfall model is comprised of the separate and isolate phases of specification and development. on the other hand, in a spiral model the different specification, development and validation phases are interleaved. so, by following a process model we can control various activities required to develop and maintain the software. the waterfall model is a classical software life cycle model. the model’s flow is sequential as the suggests similar to a waterfall in a top-down fashion, that is the reason it is also known as the linear sequential model. the process flow could not pass through the bottom to top it always flow from top to bottom and this makes it crucial to be completely preplanned to reduce the chances of product failure.
the spiral model is an evolutionary type of software life cycle model which merges the features of the prototype model and waterfall model. the outcome of the spiral model is the series of the incremental releases of the software. in the core or initial pass of the process, the product specification is formed. further then more improved variants of the software get developed. the project starts by defining the entry axis points in the spiral model. it works by dividing the model into framework activities, which are known as task regions. the spiral model is different from waterfall model due to the feature of definite identification of the risk which reduces the chances of failure of the project.
both the models, waterfall model and spiral model are used in software development. waterfall model spiral model is a risk-driven software development process model. it is a combination of waterfall model the major difference between these software process models waterfall and the spiral is that the waterfall model is comprised of the separate and isolate phases of specification and development. on the other hand, in a spiral model the different specification, development and validation phases are interleaved., spiral model, spiral model, prototype model, v-model, iterative model. the spiral model combines the idea of iterative development with the systematic, controlled aspects of the waterfall model. this spiral model is a combination of iterative development process model and sequential linear development model i.e. the waterfall model with a very high emphasis on risk analysis. the spiral model is a risk-driven software development process model. based on the unique risk patterns of a given project, the spiral model guides a team to adopt elements of one or more process models, such as incremental, waterfall, or evolutionary prototyping.
what the differences between software life cycle models v-model, agile, waterfall , spiral- advantages and one of the basic notions of the software construction — is the software development life cycle model. in the previous software development model like the waterfall or the spiral model, testing will run after the,
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