Software development and testing models 2

	Advantages	Disadvantages
Agile	* The rapid development of software * Customers, developers and testers constantly interact with each other. * A new version comes out frequently (weeks). * Face-to-face conversation is important. * Closely daily cooperation between developers and testers. * Attention to technical and design. *Adaptation to changing circumstances. * Even changes in the later stages are solving *flexible	*There is a lack of documentation. * Customer demand must be accurate otherwise the project could fail. * The team must be skilled and experienced.
V-model	*Simple to use. * Testing happening as a planning, test designing happens before starting a coding. * Identifying bugs early stages of development * This model can prevent the passage of bugs throughout the system	* least flexible
waterfall	* Simple to use because of the order. * Easy to manage * Phases are overlapping and there is order in the model * Works well in small models are well clear requirements	*Not flexible *very slow *After the application is in testing phase, it is very difficult to go back and change something that was-calculated at the concept stage. * Not suitable to model that have high amounts of risk *The customer is not a development partner *There is not a lot of communication between developers and testers