螺旋模型和增量模型之间的区别

1.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。

2.增量模型：
增量模型是一种软件开发模型，其中对产品进行增量分析，设计，实施和测试，直到完成产品为止。发生了多个开发周期，并将这些周期划分为更多较小的模块。通常，在第一个模块期间会生产增量模型的工作软件。该模块的每个后续发行版都会在先前发行版中添加函数。在增量模型中，过程一直持续到完成整个系统为止。

螺旋模型和增量模型之间的区别：

S.No.	Spiral Model	Incremental Model
1.	Spiral model is a software development model and is made with features of incremental, waterfall or evolutionary prototyping models.	Incremental Model is a software development model where the product is, analyzed, designed, implemented and tested incrementally until the product is finished.
2.	In spiral model requirements and early stage planning is also necessary.	In incremental model requirements and early stage planning is necessary.
3.	Flexibility to change in spiral model is not that difficult.	Flexibility to change in incremental model is Easy.
4.	There is low amount risk in spiral model.	There is also low amount risk in incremental model.
5.	While cost of spiral model is very expensive.	Cost of incremental model is also Low.
6.	Spiral model can handle large project.	Incremental model can’t handle large project.
7.	In spiral model overlapping of phases is not possible.	In incremental model overlapping of phases is possible.
8.	Testing is done in spiral model at the end of the engineering phase.	Testing is done in incremental model after every iteration of phase.
9.	Returning to previous stage/phase in spiral model is possible.	Returning to previous stage/phase in incremental model is possible.
10.	In spiral model large team is required.	In incremental model large team is not required.