1. risk/understand complexity and environment capability
1.1. high
1.1.1. haven't done successfully
1.1.2. not routine require
1.1.3. affect many system
1.1.4. affect stakeholder
1.1.5. can't easily be reversed
1.1.6. not well understood
1.1.7. unstable or problematic
1.2. low
1.2.1. Reverse^
1.3. environment
1.3.1. level of understanding current IS
1.3.2. skilled resource (people)
1.3.3. operation capacity
1.3.4. implementing experance
2. strategies
2.1. Big Bang
2.2. phased approach
2.3. pilots system(model office)
3. planning
3.1. contingency
4. what
4.1. remove
4.1.1. resone
4.1.1.1. replaceing
4.1.1.2. failure can't be solve
4.1.1.3. cope with tec
4.1.1.4. completed it purpose
4.1.2. consider
4.1.2.1. saved data
4.1.2.2. user know ?
4.1.2.3. stakeholder affect ?
4.1.2.4. alternative?
4.2. change
4.2.1. reson
4.2.1.1. fixing fault
4.2.1.2. improve performance
4.2.1.3. user requierment
4.2.2. consider
4.2.2.1. announce user
4.2.2.2. affection on stackhohers
4.2.2.3. training need?
4.2.2.4. systems coordination check
4.3. introduce new
4.3.1. reson
4.3.1.1. new product, service, automation
4.3.1.2. replace removed
4.3.2. cosider
4.3.2.1. user inform and train
4.3.2.2. test conect with other systems
4.3.2.3. data source
4.3.2.4. support and maintainance
5. types
5.1. hardware and infrastructure
5.1.1. replace worn-out/outdated
5.1.2. upgrade
5.1.3. increase storage
5.1.4. improve processing or network perphormance
5.1.5. move to virtual. server tec
5.1.6. co-location and shared services/ cloud tec
5.2. software
5.2.1. operating system/platform upgrade
5.2.2. change and enhancement to system
5.2.3. new process or systems developmemt
5.2.4. security patches
5.2.5. improvement to system performaance
5.2.6. removing no longer required feature
5.3. data
5.3.1. removing
5.3.2. migrating
5.3.3. archive
5.3.4. update
5.3.5. editing
5.3.6. structure change
5.3.7. update data base tec ex SQL
6. impact analysis
6.1. high level
6.1.1. customer, supplier
6.1.2. people
6.1.3. process
6.1.4. product
6.1.5. organisation
6.1.6. location
6.1.7. data
6.1.8. application and tec