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IB compsci chapter 1 > planning, system installation > Flashcards

planning, system installation Flashcards

1
Q

what are the 4 purposes of a new system

A
  • increase productivity
  • increase quality of the output
  • minimize costs
  • reduce the errors of the existing system
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2
Q

list 6 potential organizational issues

A
  • lack of guiding organizational , business strategies
  • lack of stakeholder participation
  • lack of end-user ‘ownership’ of system
  • lack of attention to required training
  • lack of attention to organizational issues (eg. organizational culture)
  • lack of attention to design of tasks, jobs
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3
Q

what is a feasibility report

A

it decides whether the proposed project should be pursued / implemented by evaluating and analyzing the project on its potential

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4
Q

list the name of the 5 criteria the feasibility report evaluates on

A

technical
economical
legal
operational
scheduling

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5
Q

what does the technical feasibility deal with

A

whether the existing technology is sufficient to implement the new system

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6
Q

what does the economical feasibility deal with

A

whether the new system is cost effective

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7
Q

what does the legal feasibility deal with

A

whether there are any conflicts between the new system and any regulations or laws

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8
Q

what does the operational feasibility deal with

A

whether the existing organizational procedures are sufficient to support the operation of the new system

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9
Q

what does the scheduling feasibility deal with

A

how long it takes to implement the new system

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10
Q

what is change management

A
  • involves various parameters
  • process of shifting individuals, teams, departments, organizations from the current state to the desired state
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11
Q

what is a legacy system

A
  • old technology
  • some systems that belong to this ‘old technology’ category still play an important role in the organization
  • its data cannot be converted to newer formats or else its application cannot be upgraded
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12
Q

what does the administration need to pay special attention to for legacy system

A

exchange of data between legacy and new systems

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13
Q

what is a business merger

A

combining two or more business entities

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14
Q

what are the four strategies for integrations (business merging)

A
  1. keeping both information systems, developing them to have the same functionality
  2. replacing both information systems with a new one
  3. selecting the best information systems from each company and combining them
  4. selecting one company’s information system and dropping the other
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15
Q

what is software incompatibility

A

where different systems cannot operate on the same computer or on computers linked by network

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16
Q

for what type of system is a locally hosted system most appropriate for

A

larger, complex systems

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17
Q

for what type of system is a remote hosted system most appropriate for

A

no hardware equipment in place

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18
Q

what outsource responsibilities does the company that look for remote hosted systems want

A

maintenance
support
backups
security

19
Q

what does SaaS stand for

A

Software as a service

20
Q

what is SaaS (Software as a service)

A

delivery method
allows software and data to be hosted, managed centrally on a remote data center

21
Q

how do users access SaaS

A

they pay on a subscription basis

22
Q

what does a SaaS solution need to be accessed

A

web browser
broadband internet connection

23
Q

where do SaaS solutions reside

A

cloud

24
Q

give three advantages of SaaS

A

less expensive as it has low initial cost, only requires few investments in installation
scalable solution - company only has to adjust its monthly subscription
safe - data resides in the cloud service

25
Q

give three disadvantages of SaaS

A

if SaaS provider goes out of business, data may be lost
performance is low
integration with other SaaS is difficult

26
Q

what is changeover method

A

process of putting the new system online, retiring the old one

27
Q

why would an organization choose one implementation method over one other

A

they need to decide based on cost , risk

28
Q

what are the two implementation methods

A

conversion, changeover

29
Q

what are the four types of changeover methods

A

parallel
big bang / direct
pilot
phased

30
Q

summarize parallel changeover method

A

both systems work in parallel for a period of time
outputs of both systems are compared to ensure that the new system is functioning properly
when the company is satisfied with the output of the new system, the old system is terminated

31
Q

what is the advantage of parallel changeover method

A

limited risk

32
Q

what is a disadvantage of parallel changeover method

A

extra cost, workload as two different systems are running simultaneously

33
Q

summarize Big Bang changeover method

A

new system is plugged in and the old system is unplugged at the same time

34
Q

what is the disadvantage of Big Bang changeover method

A

very risky, dangerous, all users need to be trained before

35
Q

summarize the pilot changeover method

A
  • mostly used in large organizations that have multiple sites
  • new system is introduced in one of the sites and is extended to other sites
  • once it is proved successful, it is implemented to the rest of the company site using an another changeover method
36
Q

what is a advantage of the pilot changeover method

A

risk is low

37
Q

summarize phased changeover method

A

one module of the system is converted at a time
different parts the system are converted at different times

38
Q

what is a disadvantage of phased changeover method

A

adoption of new system takes longer so training period is extended

39
Q

what is data migration

A

transfer of data between different formats / storage types / computer systems

40
Q

when does data migration happen

A

when organization changes / upgrades / merges its information systems

41
Q

how does data migration achieve efficient use of Human Resources

A

works automatically

42
Q

how does data migration happen (4 steps)

A
  • extracts data from source system
  • transforms data for target system
  • loads data onto target system
  • validates data loads
43
Q

what are 3 problems that may arise during data migration

A
  • incapability of moving information due to incompatibility with the new system
  • data loss / incomplete data transfer or errors in the process
  • misinterpretation of data due to incompatibilities

IB compsci chapter 1 (10 decks)

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