CS 47/147 Advanced Object-Oriented Programming - Caltech

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From Requirements to Design• Software process has stages:Requirements, Design, Implementation,…• Imagine “perfect” division of labor:– Analysts do requirements analysis.– Designers design.– Developers implement, testers test, etc.Analysts must “hand off” project to designers.Must communicate requirements in a way designers find useful.• There’s a school of thought saying you shouldn’t organize this way.– “Agile” development.– Everyone does everything.– Avoid “ceremonious” phase transitions and handoffs.– Expect change -- don’t document too early.6
Requirements Document• “Output” of requirements analysis.• Contains:– Requirements specification• Data Model• Specification of Operations– Other things: performance, scheduling, etc.– Rationales for decisions.7
Page 2 and 3: CS 3Introduction to Software Engine
Page 4 and 5: Last Time: Requirements Analysis•
Page 8 and 9: The Object Motto“Ask not first wh
Page 10 and 11: Elements of a Data Model• Diagram
Page 12 and 13: Book Example: File System• Basic
Page 14 and 15: Book Example: File System• Files
Page 16 and 17: Book Example: File System• A dire
Page 18 and 19: Book Example: File System!FSObjectR
Page 21 and 22: Operations• As for a data abstrac

CS 47/147 Advanced Object-Oriented Programming - Caltech

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