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Enable Enterprise Information System > W8 Acquiring Information System > Flashcards

W8 Acquiring Information System Flashcards

1
Q

Explain what is cost benefit analysis and the different models used

A

identifying how to best spend limit resources
 Net present Value: value/ cost of the project
 Return on Investment: effectiveness asset > Profits
 Breakeven analysis: When total profit = cost
 Business case approach: Justifying the finding

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2
Q

Discuss the different way to write up a IS application

A

prewritten application: standard features, need to
 TIME/COST: low, cheap
 SYSTEM: need to consider current/ future needs
 EXAMPLE: Open sources
Customised - prewritten application: Customising existing
 TIME/COST: high,
 SYSTEM: can quickly become obsolete
 EXAMPLE: Outsourcing

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3
Q

Discuss the advantages in acquiring IS through a lease

A

TIME: low
COST: effective
SHOPPING: Try before buy AND different options

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4
Q

Discuss the disadvantages in acquiring IS through a lease

A 
REQUIREMENT: 
	Not exact match, 
	cannot modify
IMPLEMENTATION
	Difficult to integrate 
SYSTEM
	We do not know how the software foundmental works
VENDOR: 
	No control, 
	risk of discontinuing
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5
Q

Discuss the different method of acquiring IS through a lease

A 
Application Service provider: Build for the company 
	OWNERSHIP: Own, 
	COST: invest
SaaS: 
	OWNERSHIP: Rent, 
	COST: utility
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6
Q

Identify reason why an organisation might want to insource

A 
YES to COMPANY SKILL:  
	Core Competency
	Cheap to build
YES to INFORMATION SYSTEM: 
	Skills required
	able to handle peak load
Protect DATA: 
	When Data Sensitive, 
	Data require consolidation 
YES to TIME: Not enough time
NO to OUTSOURCE: 
	Expect to outsourcer to discontinue, 
	poor culture and experience
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7
Q

Explain what is Feasibility Study and the different studies conducted

A

Feasibility Study: Keep/Improve/New
 Technical feasibility:
 Economical: acceptable financial risk
 Behavioural: Identifying human issues

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8
Q

Explain the role of the IT governance/ Steering Committee

A

decide which recommendation to undergo

  1. Announce
  2. Perform system analysis
  3. Budget the full cost of completing SDLC
  4. Monitor
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9
Q

Explain what is System design under SDLC and

Identify what areas are targeted by system design SDLC

A 
Identifying the necessary specification to 
	Resolving the business Problem
	build and 
	implement the system
BUSINESS PROCESS: 
	Outputs, Input, Processes
TECHNICAL
	Hardware, software and data
	Design
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10
Q

Identify the different methods of implementing a IS

A

Direct (Plunge): OLD: discontinued, NEW: Start
 Risky, no fall back system
Parallel: OLD: Continue, NEW: Start
 Double entry
Phased: OLD: Limited Time, NEW: One module at a time
Pilot: OLD: Limited time, NEW: Different areas
Phrased and pilot: Gradual to test for bugs

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11
Q

Discuss the advantages of SDLC

A

REQUIREMENT: Collect most of user needs
SYSTEM: maintain standards = Better quality
EMPLOYEE: Systematic = Help staff learn, Easy to understand

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12
Q

Discuss the disadvantages of SDLC

A

REQUIREMENT
 Objectives are frozen, unlike agile
 Difficult to describe requirements for the system
IMPLEMENTATION:
 Long process
EMPLOYEE:
 Excessive documentation = a lot of and hard to study

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13
Q

Explain what is Rapid application development and the advantages and disadvantages

A

The program is automatic generated from models
REQUIREMENT: Actively involve users
IMPLEMENTATION: (+) Fast to create/maintain/modify
COST: (+) Low
SYSTEM: (-) machine do not consider optimisation, etc
 Low quality,
 Limited functionality,
 Limited adaptability,
 only for components and not final system
OTHER: (+) low documentation,

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14
Q

Explain what is Joint Application Design and the advantages and disadvantages

A 
Group meeting => define + system requirement
REQUIREMENT: (+) Involves many users
IMPLEMENTATION:(+) 
	 Saves time, 
	 Easy to implement 
COST: (+) Lower training cost
SYSTEM: (+) High quality
OTHER: (+) Generate lot of user support 
(-) Attendance, problem associated to group meetings
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15
Q

Explain what is Agile development and the advantages and disadvantages

A 
Delivering functionality using rapid iterations, frequent
REQUIREMENT: (+) 
	 Flexible (can change requirement), 
	 Constant communication
SYSTEM: (-) 
	 Important are first, 
	 immediate features = limited
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16
Q

Explain what is End User Development and the advantages and disadvantages

A 
User develops their own tools
REQUIREMENT: (+) 
	 Direct meet user needs, 
	 Promote acceptance of NS, 
	 User control the application
SYSTEM: (-)
	 Lower quality
	 maybe cannot integrate 
	 poor control 
	 High maintenance, 
OTHER: (+) Bypass IS department = Free up IT resources
OTHER: (-) Documentation lacking
17
Q

Explain what is Component base development and the advantages

A

Using standard components (off the shelf components) to build an application
SYSTEM: (+)
 Less programming,
 Focused on assembly

18
Q

Explain what is Integrated Computer-Assisted Software Engineering Tools (ICASE) and the advantages and disadvantages

A

Tool for decision making and computer modelling
CASE model + RAD = Automatic system generation
REQUIREMENT: (+)
 Meet user needs,
 Flexible and adaptable to changes in business
REQUIREMENT: (-) Heavily relies on accurate user requirements
IMPLEMENTATION: (+) speed up development process
COST: (-) High
SYSTEM: (+) Long expected life
SYSTEM: (-) Difficult to customise the end product
OTHER: (+) Excellent documentation

19
Q

Explain what is Object oriented development and the advantages and disadvantages

A

SYSTEM: (+)
 Real world entities,
 Reusable code
SYSTEM: (-) Limited scope

20
Q

Explain what is system analysis

A

Understand the current/existing system
 Gather System requirements
 What and how it does it and
 Strength and weakness of the system

Result: Whether to
 Improve the current
 Replace with a new system

New System
 What does the new system need to do?

21
Q

Explain what is the maintenance phrase

A

Up to date reports on the performance of the IT system
AUDIT
Working as expected
 System Load: Identifying usage and excess capacity
 Availability: uptime and downtime
Effectiveness of IS
 Maintenance
 Updating: to accommodate for changes
Security: Consider potential risk and controls
 Identifying and resolving breaches
Customer satisfaction

22
Q

Explain what the investigation process in SDLC

A

 Understanding the business problem
 Anticipating the likely/possible problems
 Specify technical options

Enable Enterprise Information System (5 decks)

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