What are the three main types of software process models?, 1. The Waterfall Model<br>2. Incremental Development<br>3. Integration and Configuration, WATERFALL: What are its 5 phases?, 1. Requirements analysis and definition<br>2. System and software design<br>3. Implementation and unit testing<br>4. Integration and system testing<br>5. Operation and maintenance, WATERFALL: What is its main drawback?, The difficulty of accommodating change after the process is underway., WATERFALL: When is it most appropriate?, When requirements are well-understood and changes will be limited (e.g., large systems engineering projects)., INCREMENTAL: How does it work?, The system is developed in increments, with each increment adding new functionality. Specification, design, and implementation are interleaved., INCREMENTAL: Name 2 benefits., 1. Reduced cost of changing requirements.<br>2. More rapid delivery of useful software., INCREMENTAL: Name 2 problems., 1. The process is not visible (lack of regular deliverables).<br>2. System structure tends to degrade as new increments are added., INTEGRATION: What is this model based on?, Software reuse, where systems are integrated from existing components (COTS)., INTEGRATION: Name 1 key advantage and 1 key disadvantage., Advantage: Reduced costs and faster delivery.<br>Disadvantage: Requirements compromises are inevitable; the system may not meet real user needs..

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