Project:Sandbox

V-Model
The V-Model Each phase must be completed before the next phase begins.
 * flowchart that takes the form of the letter V.
 * In the right-hand, upward-sloping branch of the V, testing and debugging is done.
 * The unit testing is carried out first, followed by bottom-up integration testing.
 * The extreme upper right point of the V represents product release and ongoing support.