V模型和螺旋模型之间的区别

1. V模式：
V模型是在软件测试过程中使用的最重要的模型。也称为验证和验证模型。它由已故的保罗·鲁克(Paul Rook)在1980年代引入。 V模型是一个顺序过程，其中下一个阶段仅在当前阶段完成之后才开始。在此模型中，台阶在向上弯曲时不会线性移动。

2.螺旋模型：
螺旋模型是一种软件开发生命周期模型，高度用于风险驱动模型。根据给定项目的风险模式，螺旋模型可以帮助开发人员提高模型的效率，因为大多数风险已经得到处理。它由形成螺旋形状的多个循环组成，其中每个循环称为软件开发周期的阶段。

V型和螺旋型之间的区别：

S.No.	V MODEL	SPIRAL MODEL
1.	V model is software development model but development and testing are not concurrent.	Spiral model is a software development model and is made with features of incremental, waterfall or evolutionary prototyping models.
2.	In V-model testing activities start with the first stage.	Testing is done in spiral model at the end of the engineering phase.
3.	Cost of V-model is expensive.	While cost of spiral model is also very expensive.
4.	Flexibility of V-model is Little flexible.	Flexibility to change in spiral model is not that difficult.
5.	Guarantee of success through V-model is high.	Guarantee of success through Spiral model is low.
6.	User involvement in V-model is also only in beginning.	In this user Involvement is only at the beginning.
7.	It is not iterative.	It is iterative.