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What is Requirements Specification? 开始学习
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The process of writing down the user and system requirements in a requirements document
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what are the key qualities of an Ideal Requirements Specification? 开始学习
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Clear Unambiguous Easy to understand Complete Consistent
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what are the sections of a structured specification? 开始学习
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Description of the function specified Description of inputs and their source Description of outputs and their source Information needed for running the function Description of action to be taken Description of consequences or side-effects of the function
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what are the problems of natural language? 开始学习
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Lack of clarity Ambiguity Context dependency
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what is an entity relationship diagram (ERD)? 开始学习
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Techniques that identifies a system’s entities and the relationship between those entities
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开始学习
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people, places, items, events, concepts
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开始学习
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properties or descriptive qualities of an entity
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What are ERD Relationships? 开始学习
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nks between different entities
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What are Decisison Tables? 开始学习
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Technique for specifying complex if-then conditions
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name some mathematical methods? 开始学习
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Recurrence relations Axiomatic definition Formal specifications Implicit equations Regular expressions
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What are Mathematical methods? 开始学习
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Describes both static and dynamic aspects of the system
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What is Requirements Validation? 开始学习
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The process of “checking that requirements actually define the system that the customer really wants” (Sommerville)
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List the Requirements Validation Checks 开始学习
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Consistency checks, Completeness checks, Realism checks, Verifiability.
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What is a consistence check? 开始学习
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Consistency checks: requirements should not conflict
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What is a compleatness check? 开始学习
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Completeness checks: all functions and constraints need to be defined
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开始学习
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Realism checks: make sure the requirements can be implemented
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What is a Verifiability check? 开始学习
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Verifiability: requirements should always be written so that they are verifiable/testable
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list 3 requirments validation techniques. 开始学习
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Requirements reviews, Prototyping, Test-case generation.
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What is a Requirements reviews? 开始学习
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systematic analysis of requirements by a team of reviewers
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开始学习
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Prototyping: an executable model of the system is demonstrated to users/customers
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what is Test-case generation: 开始学习
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Test-case generation: derive tests for each of the requirements
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What is requirements management? 开始学习
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The process of “understanding and controlling changes to system requirements”
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