The reason why the father wished to close down the branch was that it appeared to be making a loss. However, it is quite the reverse; if the branch was closed then, the positive contribution from the branch would be lost and overall profits would fall. This is because the indirect costs of production do not vary with output and, therefore, closure of a section of the firm would not lead to immediate savings.
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 before the next phase can begin and there is no overlapping in the phases. The waterfall Model illustrates the software development process in a linear sequential flow.
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 "The Waterfall" approach, the whole process of software development is divided into separate phases. In this Waterfall model, typically, the outcome of one phase acts as the input for the next phase sequentially.
The following illustration is a representation of the different phases of the Waterfall Model. This system design helps in specifying hardware and system requirements and helps in defining the overall system architecture.
Each unit is developed and tested for its functionality, which is referred to as Unit Testing. Post integration the entire system is tested for any faults and failures. To fix those issues, patches are released.
Also to enhance the product some better versions are released. 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.
The next phase is started only after the defined set of goals are achieved for previous phase and it is signed off, so the name "Waterfall Model". In this model, phases do not overlap.
Waterfall Model - Application Every software developed is different and requires a suitable SDLC approach to be followed based on the internal and external factors. Product definition is stable. Technology is understood and is not dynamic.
There are no ambiguous requirements. Ample resources with required expertise are available to support the product. The project is short. Waterfall Model - Advantages The advantages of waterfall development are that it allows for departmentalization and control.
A schedule can be set with deadlines for each stage of development and a product can proceed through the development process model phases one by one. Development moves from concept, through design, implementation, testing, installation, troubleshooting, and ends up at operation and maintenance.
Each phase of development proceeds in strict order. Each phase has specific deliverables and a review process. Phases are processed and completed one at a time.
Works well for smaller projects where requirements are very well understood.Jan 23, · Create a life cycle model. A life cycle refers to the "life" of your products, between when it was first introduced and the present day.
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Corresponds to introduction stage of the Product Life Cycle. Plans for full-scale marketing and manufacturing must be refined and settled.
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