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1.2B Applicationof software Development Approaches 2B, C, D

Key words are - direct cutover, parallel implementation, phased implementation, pilot implementation, current trends, CASE tools, outsourcing, employment trends, LAN, COTS packages
Based on Set 2B, C and D of Davis textbook
AB
direct cut overThe old system is removed and the new system implemented immediately.
parallel implementationThe new system is introduced completely. For a pleriod the old system remains operational.
phased implementationAspects of the new system are progressivelyimplemented until finally the new system replaces the old systlem.
pilot implementationA smalkl amount of data is used with the new system to ensure it operates as intended. The new system is finally implemented in its entirity.
outsourcingThe contracting of services to external companies specialising in particular tasks.
employment trendsshort term contracts to wrtie particular software products.
browsersoftware that enables the viewing of page on the World Wide Web (WWW)
LANLocal Area Network. A collection of computers contained within a small geographical area that communicate using the same protocol.
COTS packagesCommercial-Off-The-Shelf packages
CASE toolsComputer Aided Sofware Engineering tools. Examples include - system modeling tools, data dictionary creation, automatic test data creation, productionof source code templates.

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