With this approach you take, the time spent in (or estimated for) the planning.Phase and use industry standard percentages (or percentages from the organization s. 'Own experiences) to calculate estimates for the other SDLC phases. Industry standards.Suggest that a "typical." business application system spends 15% of its effort.In the planning phase 20% in, the analysis phase 35% in, the design phase and 30%,,In the implementation phase. This would suggest that if a project takes four months.In the, planning phase then the rest of the project likely will take a total of 22.66.Person-months (4. 15 22.66). These same industry percentages are then used to.Estimate the amount of time in each phase (Figure 2-10). The obvious limitation of.This approach is that it can be difficult to take into account the specifics of your individual.Project which may, be simpler or more difficult than the "typical project."
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