Block 3 Start - Information System Development

Question 1

What are the Software Development Processes

Answer 1

1. Sys analysis
2. Sys design
3. Implementation
4. Validation
5. Maintenance

Question 2

What does information system development involve?

Answer 2

Information Sys Dev - Building custom complex systems for a buisness client

Includes - Project initiation, feasibility study, deployment

Project initiation = Just before system analysis

Feasibility - Pre System Analysis

Deployment - Post Validation

Question 3

What is project initiation?

Answer 3

• Project starts at a problem or opportunity (painpoint)
  
  • Current sys is not compliant with new legislation
  • Current sys is too slow
  • Current sys cant cope with increased scale
  • Can we use new tech (AI chatbots)
• What is their vision for the project down the road

Question 4

What is a feasibility study

Answer 4

• Do they need the new system
  
  • Tech cant always solve the problem
  • Could be a bottleneck within departments or training for other people
• Can it be done with the budget, time and resources
  
  • Consider current sys capabilities and limitations
  • Use data sources and data collection
  • Take into account technical, financial, legal and social constraints
• Explore options
  
  • New sys
  • Leaving things as they are
  • Improving manual process
• Analyst produces a formal statment of costs or benefits in a quota on a contract
  
  • Documented process
• Client comes to a decision point

Question 5

What is system analysis?

Answer 5

Understanding and defining what the system needs to do

• Uses use cases to
  
  • Gather system requirements
  • System descriptions

Question 6

What is system design?

Answer 6

• Description of how the system should be made (Diagrams of all the aspects of the system, taken together they communicate design)
• Outputs arc diagrams, UI, Flowcharts

Question 7

What is implementation?

Answer 7

• System is created
• Hardware purchased and installed
• Documentation and procedures/user manuals in terms of use and recovery
  
  • As important as the system
  • In order to update the system

Question 8

What is validation?

Answer 8

• Ensures the system meets the specs and there are no bugs
• Completed in different stages

Question 9

What is deployment?

Answer 9

Deployment (Migration/cut-over/publishing)

• System is installed and put into use
• Involves long period of training and organisational learning
• Most errors are identified at this stage
  
  • Put into a real world time constraint
  • If something takes too long in a real world scenario then its not worth it
• Involves replacing an old system

Question 10

What are the different types of migration strategies?

Answer 10

Question 11

What is maintenance?

Answer 11

• Modifying a system after it has been delivered and put into use
  
  • Do you need more functionalities
    
    • Business expands so does the required functionalities
• Term is mostly used for changing custom systems
  
  • Lots of back and fourth
  • Environment changes to ensure the software meets the changes of the software system

Maintenance Cost

• Better preplanning and testing procedures = less maintenance
• Depends on a contractual responsibility - do you have to deal with shit code