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