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Agile Methodologies As you might imagine, many other approaches to systems analysis and design have been developed over the years. These approaches include eXtreme Programming, the Crystal family of methodologies, Adaptive Software Development, Scrum, and Feature Driven Development. In February 2001, many of the proponents of these alternative approaches met in Utah in the United States and reached a consensus on many of the underlying principles their various approaches contained. This consensus turned into a document they called “The Agile Manifesto” (see Appendix B for more detail).

2. Describe your university or college as a system. What is the input? The output? The boundary? The components? Their interrelationships? The constraints? The purpose? The interfaces? The environment? Draw a diagram of this system. 3. A car is a system with several subsystems, including the braking subsystem, the electrical subsystem, the engine, the fuel subsystem, the climate-control subsystem, and the passenger subsystem. Draw a diagram of a car as a system and label all of its system characteristics.

The fundamental principle of any RAD methodology is to delay producing detailed system design documents until after user requirements are clear. The prototype serves as the working description of needs. RAD involves gaining user acceptance of the interface and developing key system capabilities as quickly as possible. RAD is widely used by consulting firms. It is also used as an in-house methodology by firms such as the Boeing Company. RAD sacrifices computer efficiency for gains in human efficiency in rapidly building and rebuilding working systems.

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