Question

What is different between spiral and win win spiral model

Answer 1

The spiral model

The spiral model also called the spiral lifecycle model is a systems development lifecycle (SDLC) model combining the properties of the prototyping model and the waterfall model. This model is good for large and mission-critical projects. It requires strong approval and documentation control.

The Win-Win spiral

The Win-Win spiral model is an add-on to the spiral model. The stages in this model are same as the stages in the spiral approach. The only difference is that there is a discussion and negotiations of the stakeholders’ win conditions  on the requirements that need to be included in the current iteration of the software takes place between the development team and the customer at the time of the identifying the requirements