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