CIS 210 Systems Analysis and Development Week Part I Finalizing Design Specifications Objectives • Upon completion of part I you will be able to: – Understand and be able to explain the concepts related to system design specifications – Understand and be able to explain the concepts related to structured charts – Understand and be able to explain the concepts related to evolutionary and throwaway prototyping – Understand and be able to explain the concepts related to the role of CASE tools in capturing design specifications Overview • Today’s Emphasis on Speed – Blurring the lines • Analysis and design • Design and implementation • Traditional Design Specification – Clear lines – Completed by analysts • Agile Methodologies – Focus on software – Rapid iterative movement between design and coding Finalizing Design Specifications • Overview – Result of the SDLC – Software requirements specifications • The Final Design Specification Process – Blueprint for physical system • Deliverables and Outcomes – Set of physical design specifications Traditional Methods • Overview – Pre-CASE – Natural language documents • Specification Documents – Computer-based requirements documents • Structure Charts – – – – – Show breakdown of the system Modules Data couple Flag Pseudocode Traditional Methods for Representing Specifications • Prototyping – Overview • Construction of model system • Allows testing by users and developers – Evolutionary prototyping • Prototype becomes actual system – Throwaway prototyping • Does not preserve prototype • Quick development Traditional Methods for Representing Specifications • Rapid Application Development (RAD) – – – – – – Planning Design Construction Cutover Advantages Disadvantages Agile Methodologies • Overview – – – – Requirements Functional design Code Testing • eXtreme Programming – Simple design • constraints – Refactoring Summary • • • • • • Finalizing design specifications Specifications documents Structure charts Prototyping Rapid application development Agile methodologies ... to: – Understand and be able to explain the concepts related to system design specifications – Understand and be able to explain the concepts related to structured charts – Understand and be able... charts – Understand and be able to explain the concepts related to evolutionary and throwaway prototyping – Understand and be able to explain the concepts related to the role of CASE tools in capturing... design specifications Overview • Today’s Emphasis on Speed – Blurring the lines • Analysis and design • Design and implementation • Traditional Design Specification – Clear lines – Completed by