Chapter 12.7, Problem 12.4ARQ

Explanation of Solution

Origin of SDLC:

System Development Life Cycle (SDLC) is used to develop information systems and applications.

During 1970’s the IT industry tried many projects on the basic tasks that need to be performed to successfully build and maintain Information Systems (IS), so they build System Development Life Cycle (SDLC) in which the basic tasks were combined into phases of systems development.

SDLC came to prominence when the US department of defence required it on government contracts.

Five Basic System Development Activities:

The five basic system development activities are:

• Define the system.

  It includes defining system goals and scope, accessing cost feasibility, technical feasibility, schedule feasibility and organizational feasibility.

• Determine the requirements of the project

  It includes mentioning the sources of requirement, finding out the role of a prototype and approving requirements by user.

• Define system components:

  It includes determine hardware specifications and program specifications.

• System Implementation:

  It includes testing the system, system conversion and conduct unit test.

• Maintain system:

  It includes the work done to fix or improve the system or adapt it to changes in requirement.

The tasks required for definition, requirements and design steps:

• Tasks required for Definition:
  • Define system goals and scope: the first step of definition is to define the system goals and scope.
  • Access feasibility: After defining the projects scope and goals, one need to access the feasibility which has four dimensions:
    • cost feasibility
    • technical feasibility
    • schedule feasibility
    • organizational feasibility
  • Form a team for completion of project.
• Define requirements:
  • Find all the sources of requirements.
  • Conduct user interviews.
  • Evaluate the existing pattern
  • Determine the newly generated forms or queries.
  • Identify new features and applications.
  • Consider security and data model.
• Component Design:
  • Determine specifications for hardware.
  • Determine program specifications.
  • Design the database, procedures and create job definition.

The task required to implement a system:

In order to implement the system, the following tasks are used:

• Testing- only after each component is tested separately the entire system is tested as an integrated whole.
• System conversion- After testing the organization installs new system and System conversion is the process to convert business activity from old system to new system...