ISOM221+Lecture+21+-+Implementation+II+_Installation_

ISOM221+Lecture+21+-+Implementation+II+_Installation_ -...

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ISOM221 Information Systems Analysis and Design Lecture 21: Implementation II (Installation) 1 Agenda Be familiar with the system installation process Understand different types of conversion rategies and when to use them strategies and when to use them Understand several techniques for managing change Be familiar with post-installation processes 2 Key Ideas Managing the change to a new system is one of the most difficult tasks in any organization Transitioning to new systems involves managing change from pre-existing norms and habits Change management involves: Unfreezing : loosening up peoples’ habits and norms Moving : transition from old to new systems Refreezing : institutionalize and make efficient the new way of doing things 3 Implementing Change As-Is System To-Be System Transition Unfreeze Analysis & Design Move Technical Conversion Change Management Refreeze Support & Maintenance 4
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Elements of Migration Plans 5 Key Ideas Post-implementation activities include providing: System support , such as help desks Systems maintenance , fixing bugs and providing improvements Project assessment , learning how to improve from project experiences Maintenance can account for 80% of IS budget 6 Agenda Be familiar with the system installation process Understand different types of conversion rategies and when to use them strategies and when to use them Understand several techniques for managing change Be familiar with post-installation processes 7 Conversion Conversion is the technical process by which a new system replaces an old system Three major steps in a conversion plan Acquire and install needed hardware Install software Convert data 8
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Three Dimensions of Conversion Conversion style the style in which the conversion is done Conversion location what location or work groups are converted at what time Conversion modules what modules of the system are converted at what time 9 Conversion Style Direct conversion The new system instantly replaces the old one The simplest and most straightforward, but also the riskiest arallel conversion Parallel conversion Both old and new systems are used for a period of time The old system is abandoned when the new one is proven fully capable If problems are discovered, simply turn off the new system and fix it 10 Conversion Location Pilot conversion One or more locations are converted to work out bugs before extending to other locations Different organizational units are using different systems and processes hased conversion Phased conversion The system is installed sequentially at different locations
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This note was uploaded on 12/22/2010 for the course ISOM ISOM221 taught by Professor Sheunhhee during the Spring '09 term at HKUST.

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ISOM221+Lecture+21+-+Implementation+II+_Installation_ -...

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