Design User Interface Of Interactive Systems

Part 1The waterfall model is a sequential process used more often in software development processes. It is one of the models of Software Development Life Cycle models. This process is similar to a waterfall where the model flows downwards in a steady manner through the different phases of requirement analysis, design, code, test and maintenance CITATION IT31 \l 1033 (IT - 302 Chapter: 3) CITATION Wat1 \l 1033 (Waterfall model).The spiral Model is a combination of the prototype model and waterfall model. It has properties of iteration and linear nature of these models. It moves in a spiral manner passing through all the stages of software development. In each of its iterations, the process of software development moves in a phase-wise linear manner CITATION IT31 \l 1033 (IT - 302 Chapter: 3) CITATION Spi \l 1033 (Spiral Model).Waterfall modelSpiral modelIt is not user centric, instead it is document centric.It is centered on error reduction.It makes assumption regarding the requirement.It does not make much assumption and keep checking for risk in each iteration.It is rigid in nature.It is flexible in nature.It doesn’t measure risk sensitivity.It senses high risk sensitivity at each stage of development.Its simplicity makes it