Major difference between waterfall and iterative model is that waterfall model has a linear process in which full product is available after the last phase, while incremental model full product is available after several such phases.
waterfall model is good when we have a clear understanding of requirements.
Incremental model is good when we have to deliever the final product wihin certain timeline and we have very less number of programmers available to complete the product in time, so basic idea is to deliever a working partial product within time and provide it's additional functionalities later.
The waterfall model is also known as the linear sequential model. This model is very easy to implement, and output is generated after every stage. However, real projects usually don't follow the flow in the model.
In the case where it is a simple project with well defined requirements and with very little likelihood of them changing during the development, then the Waterfall model is good. Each step can be completed before moving on to the next with a very small chance that any stage would have to be gone back to. An iterative model is more likely to be used in more complex systems where there is a greater likelihood for the requirements to change.
No iterations no steps and no fall from the steps. So, water without fall is only water which is 3D object not a waterfall.
Iterative waterfall model is a software process model also called the incremental process model. http://en.wikipedia.org/wiki/Iterative_and_incremental_development
Major difference between waterfall and iterative model is that waterfall model has a linear process in which full product is available after the last phase, while incremental model full product is available after several such phases.
spiral model is iterative model hence its easy to implement it .
The primary one is called "Waterfall" because it all goes one way, never back.
In iterative model we get an end product at the end of each iteration. Iterative model is not so efficient and time consuming.
Iterative waterfall model is a software process model also called the incremental process model. http://en.wikipedia.org/wiki/Iterative_and_incremental_development
Major difference between waterfall and iterative model is that waterfall model has a linear process in which full product is available after the last phase, while incremental model full product is available after several such phases.
spiral model is iterative model hence its easy to implement it .
1.spiral model can be accommodate in prototyping and waterfall model. it is a model of iterative process as prototyping and also a systematic approach to solve a problem as in waterfall model. 2. spiral model take problem as a series of step to solve a problem as in waterfall, and take the contribution of users or customers in each phase as in prototyping model.
agile methodology, spiral, iterative, waterfall, model-driven development architecture
The primary one is called "Waterfall" because it all goes one way, never back.
I will try to answer this quickly as I don't have much time. As the name suggests, the waterfall model follows the path of an waterfall. It starts in the first stage of orientation, and ends at the release. It can only go one way (to the end goal) and the stages are very strict (you cant go back to a earlier stage). The Spiral model understands that reality doesn't always follow theory, and that an project should be designed to follow that reality. There are multiple prototypes released, and phases can be repeated until the desired result is reached (hence the spiral). The iterative model combines those two, making (IMHO) the waterfall model more ready for the real world. You should try googling yourself, I found lots of info about the differences in this article about the advantages of the waterfall model: http://www.waterfall-model.com/the-waterfall-model-avantages-and-disadvantages
1. Waterfall Model 2. Spiral Model 3. Iterative Model 4. Prototype Model 5. RAD Model 6. COCOMO Model 7. V-Model 8. Fish Model
In iterative model we get an end product at the end of each iteration. Iterative model is not so efficient and time consuming.
nothing
Iterative
a model that goes back to an earlier step in the process