ISBN : 978-81-963532-2-3 (E-Book) easily portioned into units in terms of objects. Advantages: • User gets a chance to experiment partially developed system • Reduce the error because the core modules get tested thoroughly. Disadvantages: • It is difficult to divide the problem into several versions that would be acceptable to the customer which can be incrementally implemented & delivered. Fig 3.3: Evolutionary Model 5. SPIRAL MODEL The Spiral model of software development is shown in fig. 4.1. The diagrammatic representation of this model appears like a spiral with many loops. The exact number of 17 Software Engineering Keerthana P, Manasa KN, Ganga D Bengal
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