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