Software Requirements - Ian Sommerville

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The LIBSYS system●●A library system that provides a single interfaceto a number of databases of articles in differentlibraries.Users can search for, download and print thesearticles for personal study.©Ian Sommerville 2004 Software Engineering, 7th edition. Chapter 6 Slide 12
Examples of functional requirements●●●The user shall be able to search either all of theinitial set of databases or select a subset from it.The system shall provide appropriate viewers forthe user to read documents in the documentstore.Every order shall be allocated a unique identifier(ORDER_ID) which the user shall be able tocopy to the account’s permanent storage area.©Ian Sommerville 2004 Software Engineering, 7th edition. Chapter 6 Slide 13
Page 1 and 2: Software Requirements©Ian Sommervi
Page 3 and 4: Topics covered●●●●●Functi
Page 5 and 6: What is a requirement?●●It may
Page 7 and 8: Types of requirement●●User requ
Page 9 and 10: Requirements readers©Ian Sommervil
Page 11: Functional requirements●●●Des
Page 15 and 16: Requirements completeness and consi
Page 17 and 18: Non-functional classifications●
Page 19 and 20: Non-functional requirements example
Page 21 and 22: Examples●●A system goal• The
Page 23 and 24: Requirements interaction●●Confl
Page 25 and 26: Library system domain requirements
Page 27 and 28: Domain requirements problems●●U
Page 29 and 30: Problems with natural language●
Page 31 and 32: Editor grid requirement2.6 Grid fac
Page 33 and 34: Structured presentation2.6.1 Grid f
Page 35 and 36: System requirements●●●●More
Page 37 and 38: Problems with NL specification●
Page 39 and 40: Structured language specifications
Page 41 and 42: Form-based node specificationInsuli
Page 43 and 44: Tabular specificationConditionActio
Page 45 and 46: Sequence diagrams●●●These sho
Page 47 and 48: Interface specification●●●Mos
Page 49 and 50: The requirements document●●●T
Page 51 and 52: IEEE requirements standard●Define
Page 53 and 54: Key points●●●●Requirements

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