SDM 1 - System Development Methodologies

Question 1

What is SDM?

Answer 1

SDM is a framework containing a collection of procedures, tools, methods and documentation that contributes to the effort of a developer to build and implement a new system

Question 2

Why do we need SDM?

Answer 2

• interact and encourage user involvement
• to improve the quality of work and system
• produce complete and accurate design specification and documentation
• Meet user requirement
• To ensure consistency in management of project

Question 3

What are the 3 types of SDM?

Answer 3

• System Development Life Cycle (SDLC)
• Prototyping
• Agile (seldom)

Question 4

What is a prototype?

Answer 4

A prototype is either a partial or fully functional unit of the actual system that is used as a testing environment

Question 5

What are the 4 main types of prototyping

Answer 5

• Patched-up
• Nonoperational
• First-of-a-series
• Selected features

Question 6

What is patched-up prototyping?

Answer 6

• A working model that is patched together
• Inefficient software, for users to get accustomed with interfaces and output
  Accustomed - usual

Question 7

What is nonoperational prototyping?

Answer 7

• Non functional system
• Used to test parts of the design, not all

Question 8

What is First-of-a-series prototyping?

Answer 8

• A pilot as the full scale model of a system before more are being built
• Full operational, allowing maximum tests at minimum cost to overcome issues
• AKA Beta version

Question 9

What is Selected features prototyping?

Answer 9

• Partialy operational pilot
• The pilot releases only limited access of functionalities to users
• When we dont pay for a particular system but use their free version

Question 10

What are the advantages of prototyping?

Answer 10

• Changes can be made early in development
• Stop development on unworkable system
• Actual software can be released in advance
• Stages of work on model can be done simultaneously for different parts since the parts are modular
• Reduces man hours of work on a project due to simultaneous work

Question 11

What are the disadvantages of prototyping?

Answer 11

• Managing the prototyping process can be difficult due to rapid turnover
• Most of the features presented at the early stage are not complete
• Nightmare to create a document due to the rapid change in the prototypes
• Might put in too much effort to build the prototypes

Question 12

What is SDLC

Answer 12

An organised approach used in organizations to develop an information system

Question 13

What are the characteristic of SDLC?

Answer 13

• Also known as application development
• traditional methodology
• normaly used on large projects
• Require extensive development periods more than 1 yr
• Complicated
• Results do not always satisfy users
• Expensive approach

Question 14

What are the 6 stages in SDLC

Answer 14

Preliminary analysis, analysis, design, development, implementation, maintenance