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What is Requirements Specification? 学び始める
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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? 学び始める
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Clear Unambiguous Easy to understand Complete Consistent
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what are the sections of a structured specification? 学び始める
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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? 学び始める
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Lack of clarity Ambiguity Context dependency
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what is an entity relationship diagram (ERD)? 学び始める
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Techniques that identifies a system’s entities and the relationship between those entities
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学び始める
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people, places, items, events, concepts
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学び始める
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properties or descriptive qualities of an entity
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What are ERD Relationships? 学び始める
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nks between different entities
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What are Decisison Tables? 学び始める
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Technique for specifying complex if-then conditions
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name some mathematical methods? 学び始める
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Recurrence relations Axiomatic definition Formal specifications Implicit equations Regular expressions
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What are Mathematical methods? 学び始める
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Describes both static and dynamic aspects of the system
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What is Requirements Validation? 学び始める
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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 学び始める
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Consistency checks, Completeness checks, Realism checks, Verifiability.
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What is a consistence check? 学び始める
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Consistency checks: requirements should not conflict
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What is a compleatness check? 学び始める
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Completeness checks: all functions and constraints need to be defined
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学び始める
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Realism checks: make sure the requirements can be implemented
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What is a Verifiability check? 学び始める
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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. 学び始める
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Requirements reviews, Prototyping, Test-case generation.
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What is a Requirements reviews? 学び始める
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systematic analysis of requirements by a team of reviewers
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学び始める
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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: 学び始める
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Test-case generation: derive tests for each of the requirements
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What is requirements management? 学び始める
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The process of “understanding and controlling changes to system requirements”
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