Software Reuse - Ian Sommerville

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COTS product specialisation●●●●Platform specialisation• Different versions of the application are developed fordifferent platforms.Environment specialisation• Different versions of the application are created tohandle different operating environments e.g. differenttypes of communication equipment.Functional specialisation• Different versions of the application are created forcustomers with different requirements.Process specialisation• Different versions of the application are created tosupport different business processes.©Ian Sommerville 2004 Software Engineering, 7th edition. Chapter 18 Slide 38
COTS configuration●●Deployment time configuration• A generic system is configured by embeddingknowledge of the customer’s requirements andbusiness processes. The software itself is notchanged.Design time configuration• A common generic code is adapted and changedaccording to the requirements of particularcustomers.©Ian Sommerville 2004 Software Engineering, 7th edition. Chapter 18 Slide 39
Page 1 and 2: Software Reuse©Ian Sommerville 200
Page 3: Topics covered●●●●●The re
Page 6 and 7: Reuse benefits 1Increased dependabi
Page 8 and 9: Reuse problems 1Increased maintenan
Page 10 and 11: The reuse landscape●●●Althoug
Page 12 and 13: Reuse approaches 1Design patternsCo
Page 14 and 15: Reuse planning factors●●●●
Page 16 and 17: Design patterns●●●●A design
Page 18 and 19: Multiple displays©Ian Sommerville
Page 20 and 21: The Observer pattern©Ian Sommervil
Page 22 and 23: Types of program generator●●●
Page 24 and 25: Aspect-oriented development●●
Page 26 and 27: Application frameworks●●●Fram
Page 28 and 29: Extending frameworks●●●Framew
Page 30 and 31: Model-view-controller©Ian Sommervi
Page 32 and 33: COTS product reuse●●●●COTS
Page 34 and 35: E-procurement system©Ian Sommervil
Page 36 and 37: COTS system integration problems●
Page 40 and 41: ERP system organisation©Ian Sommer
Page 42 and 43: Design time configuration●●Soft
Page 44 and 45: A resource management system©Ian S
Page 46 and 47: A despatching system©Ian Sommervil
Page 48 and 49: Product instance development●●
Page 50: Key points●●●●COTS product

Software Reuse - Ian Sommerville

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