The mechanical CAD software will accept two- and three-dimensional geometric data from a designer. The designer will interact and control the CAD system through a user interface that will exhibit characteristics of good human/ machine interface design. All geometric data and other supporting information will be maintained in a CAD database. Design analysis modules will be developed to produce the required output, which will be displayed on a variety of devices. The software will be designed to control and interact with peripheral devices that include a mouse, scanner, laser printer, and plotter. Assume that further refinement has occurred and that the major Information domain values identified, following the decomposition technique for functional points (FP), an estimation table is developed below. Each of the complexity weighting factors is estimated, and the value adjustment factor is 1.17. Information domain value est. count Weight Number of inputs 20 Number of outputs 16 Number of inquires 20 Number of files 10 Number of external interfaces 3 From Historical data: Average productivity for systems of this type = 7 FP/pm. (per- month), labour rate = $7500/pm. Based on the FP estimate and the historical productivity data, calculate: The cost per FP Estimated effort i) ii) iii) Total estimated project cost

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System Model Approaches

The systems model approach is a process-oriented representation that emphasizes the impact or flow of information between modules. The multidisciplinary study of the use of models to design and create systems in business and IT development is known as systems model approach. It models how processes interact and what these processes do, but it does not go into detail about how these processes are implemented. Functional decomposition may be utilized to enhance the models employed in this technique, and they can be coupled to requirements models for additional system partitioning.