Methodology's

Methodology's

1. Waterfall - this follows a linear approach when going through the software development, with each phase done in series, this means that you can not go back a step once a phase is complete unless the process is iterative.

   • Unrealistic as it assumes no mistakes will be made
   • Simple to understand and follow, works when individual steps are iterative.

2. Agile - this methodology works by using an iterative approach to software development using a collection of software methods.

   • Rapid application development - Type of agile methodology where a prototype is made, then reviewed by the user and then improved on, repeating until final version is accepted.
     • End user is involved in development process, preventing understanding of initial requirements
     • Client can keep changing their mind on what they want the project to do.
   • Spiral - this works by using four iterative phases, planning, risk analysis, engineering and evaluation. The software project is repeatedly passed through these phases in iteration.
     • Reduced risk due to high risk analysis
     • Risk ananlysis requires specific expertise
     • Greater emphasis on risk
     • Used when cost and risk evaluation is important.
   • Extreme programming - this is an agile software development where the focus is on programming. works by the user giving the user requirements bit by bit to the developer throughout development.
     • Creates more robust solution
     • No quality assurance of coding
     • Has a driver a person who writes the code, and a navigator, a person who reviews the code.
   • Helps cope with evolving requirements and solutions
     • Usually shorter development time
   • Difficult to measurre progress

3. How software development is gone through, often used in solving a problem for a user. software development are the different stages which a developer will go through to try solve a problem.