is more important in the Agile than the waterfall model because the decision-making approach is different. Agile In Agile, resources and time are fixed, while the scope is flexible. So, Agile thinks, “What we can do with limited time and resources.” So, prioritization of scope is critical. Waterfall In the waterfall model, the scope is fixed, while resources and time are flexible. It means that the waterfall model thinks, “How much resources and time are needed to complete all scope.”