Test 1.2.4-1.3.2

• Alpha testing is carried out in house by the software development teams within the company. Bugs are pinpointed and fixed.
• Beta testing is carried out by end users after alpha testing has been completed. Feedback from users is used to inform the next stage of development.
• White box testing is a form of testing from the developers point of view.

  Black box testing is a form of testing from the users point of view.
• Waterfall lifecycle is a model that is completed in sequence, from start to finish.

  A, D, I, E, M and Analysis, Design, Implementation, Evaluation, Maintenance.

  T, E, L, O, S and Technical, Economic, Legal, Operating, Scheduling.
• Negatives of the waterfall model is that it can not backtrack to previous stages, therefore it may not be seen as flexible and users would have to start again.
• Agile methodologies, is a methodology that involves breaking the project into phases, and repetitively refining and maintaining upgrades to the project.

  A, D, I, E (Refine)- > D, I, E, R, M
• The agile method is more flexibile as it can backtrack to the product design and continuosly improve.
• In agile development, there is less focus on on documentation and more on consumer satisfaction
• Extreme Programming is where a pair of programmers alongside a representative end-user aim to produce high quality code, as the code is constantly critiqued and improved
• Extreme programming

  Pros is that the code is accurate.

  Cons is it is expensive as you are hiring 2 people for a one man job
• The spiral model is built upon 4 stages with focus of effectively managing risk-heavy projects:

  .Analyzing the system requirements.

  .Pinpointing and mitigating the risks.

  .Development, testing and implementation.

  .Evaluating to inform the next iteration
• In the spiral model if the project seems to bare any risk at any stage, then the project will be terminated, however hiring risk analyzers can be very costly.