Chapter 12, Problem 3DQ

Program Plan Intro

Waterfall model:

• Waterfall model is the first process model in which each phase is completed before starting the next phase.
• It is the first Software Development Life Cycle (SDLC) approach used for developing the software.
• It includes six different types of phases and they are as follows:
• Investigation
  • The clear understanding of the problems in a system and solving them is performed in investigation phase.
  • This helps in developing the project in less time.
• Analysis
  • Gathering the data from the existing system and determining the requirements for new systems is done in analysis phase.
  • It defines the user requirements and expectations.
• Design
  • The existing program or code is executed according to the required design.
  • It mainly depends on user requirements.
  • Its aim is to convert the user requirements to a complete system.
• Construction
  • Construction phase is used to execute the code according to design.
  • It is managed by the group of programmers or developers called development team.
• Integration and Testing
  • In integration and testing phase, the individual programs or codes are integrated together and tested as group.
  • It is used for finding the errors and solving them.
• Implementation
  • It is the last phase of the project development process in which development of the project is implemented and maintained.
  • It includes user preparation, site preparation, installation and many such.