waterfall model is the first liner sequential model of sdlc. waterfall model is the first approach used in software development. the first stage of the waterfall model is requirement collection, where a business analyst will collect all the information and business need of the customer in the form of requirement documents. the second stage of the waterfall model is a feasibility study. in the third stage of the waterfall model, once the feasibility study is done, move to the design phase, it defines the architecture of the project. after the complication of requirement and designing phase, the next phase is to develop a software system.
once the developer completes the coding phase, the application is handed over to the test engineers where they start checking the functionality of an application according to the customer need or requirement. after that developer needs to check whether the bug is valid or not. in the installation phase of the waterfall model, the process will continue until the application is bug-free/ stable/ and works according to customer needs. the last and long-lasting phase of the waterfall model is the maintenance phase. this process will continue until the application comes to an end. the process of taking care of product time to time is called maintenance.
the waterfall model was the first process model to be introduced. in a waterfall model, each phase must be completed before the next phase can begin and there is no overlapping in the phases. this means that any phase in the development process begins only if the previous phase is complete. in this waterfall model, the phases do not overlap. in this waterfall model, typically, the outcome of one phase acts as the input for the next phase sequentially. system design − the requirement specifications from first phase are studied in this phase and the system design is prepared. implementation − with inputs from the system design, the system is first developed in small programs called units, which are integrated in the next phase. integration and testing − all the units developed in the implementation phase are integrated into a system after testing of each unit. deployment of system − once the functional and non-functional testing is done; the product is deployed in the customer environment or released into the market.
maintenance − there are some issues which come up in the client environment. maintenance is done to deliver these changes in the customer environment. all these phases are cascaded to each other in which progress is seen as flowing steadily downwards (like a waterfall) through the phases. 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 − the advantages of waterfall development are that it allows for departmentalization and control. each phase of development proceeds in strict order. the disadvantage of waterfall development is that it does not allow much reflection or revision. not suitable for the projects where requirements are at a moderate to high risk of changing. integration is done as a “big-bang.
it’s a great option when you need to apply a sequential approach to your project plan. see how a waterfall model the waterfall model was used to develop enterprise applications like customer relationship waterfall model is an example of a sequential model. in this model, the software development, . examples of waterfall model in the olden days, waterfall model was used to develop enterprise applications like customer relationship management (crm) systems, human resource management systems (hrms), supply chain management systems, inventory management systems, point of sales (pos) systems for retail chains etc.
previously waterfall model is used to make an application like crm (customer relationship waterfall model – application. every software developed is different and requires a suitable sdlc approach to be the waterfall model is a breakdown of project activities into linear royce presented this model as an example of a flawed, non-working model; which is how object-oriented analysis and design rapid application development software,
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