Unit 7

Question 1

1. What is SDLC? What are the seven phases in system development?

Answer 1

SDLC refers to software development life cycle, also called waterfall sequence. The seven phases are planning, analysis, design, development, testing, implementation, and maintenance.

Question 2

2. Briefly explain the various types of feasibility study. Why is feasibility study important in system development?

Answer 2

The principal ones are technical, legal, operational, and economic feasibility. It is important to determine whether or not it is worth carrying out the project.

Question 3

3. What are the major differences between systems analysis and systems design?

Answer 3

System analysis refers to the understanding of and documentation of requirements for the system while system design concerns system specification, technical architecture and the make-or-buy decision.

Question 4

4. Why would an organisation consider building its own software application if it is cheaper to buy one?

Answer 4

To develop the IT skills and capabilities to expand further on the learning curve, which can turn out to become a future competitive edge.

To provide full customisation of the IS.

Question 5

5. What are the four different implementation or system conversion strategies?

Answer 5

Direct cutover: least expensive, most risky.
Pilot conversion
Phased conversion
Parallel conversion

Question 6

6. What is scope creep? How does it affect project management?

Answer 6

Scope creep refers to uncontrolled changes or continuous growth in a project’s scope effectively representing a threat to the success of the project. It threatens project management.

Question 7

7. What are the major problems of traditional Waterfall methodology in system development?

Answer 7

It is inflexible and time intensive. Therefore, other methodologies have been developed that are more agile; rapid application development, prototyping, and agile development.