Developing an IS

Question 1

What is the meaning of Information System?

Answer 1

Is:
interacting components (people, procedures, technologies) that:
collect, process, store, and distribute information
support:
control, decision-making, and management in organizations

Question 2

Why build ISs?

Answer 2

Solve problems, capture opportunities or comply with directives.

Question 3

What are the steps of the General Process Model?

Answer 3

1. Requirements
2. Design
3. Implementation
4. Testing

Question 4

Describe the Requirements Phase

Answer 4

Gather business requirements:
Users->who and how they use it.
Data->Input and output .
Business->Requisite logic, processes, and functions.

Question 5

What are the Key Components of Information Systems

Answer 5

Organizations, Humans, Technologies

Question 6

What are the levels of organizational decisions and the management functions that follow?

Answer 6

Strategic-Opport.s and Issues
Managerial/Tactical- How to utilize resources.
Operational- Taking action.

Question 7

What are the factors of information that differ at the managerial levels?

Answer 7

Time horizon
Time to act
Uncertainty
Frequency
Data source

Question 8

Name 7 different ISs

Answer 8

Mobile apps
eCommerce

ERP
Transaction Processing

Exec support
Mgt IS
Expert System

Question 9

Describe the Design Phase

Answer 9

Use Rqmts to design and elaborate on details.
Architecture-> Hardware, software.
Software design
Communication

Question 10

Describe the Implementation Phase

Answer 10

Longest
Produce code
Iterative

Question 11

Describe the Testing Phase

Answer 11

Implementation is =,, requirements.

Question 12

What is the question asked with verification?

Answer 12

Are we building the product right?

Question 13

What is the question asked with validation?

Answer 13

Are we building the right product?

Question 14

What is the SDLC and how does it differ from the General Process Model?

Answer 14

1. Planning (feasibility and requirements)
2. Analysis (data modeling)
3. Design.
4. Implementation (coding, testing).
5. Maintenance.
   SDLC talks more about the lifecycle of the Information system in the context of the organization. In a sense, it is broader than the general process model which deals primarily with the Planning, analysis, design. The implementation with the SDLC deals more the implementation of the IS into the organization.