Degree of Freedom Analysis

This is an analysis used to set the condition where properties needs to be identified. For simplification lets take an example you want to find a movie. If you know only the name of hero there might be lot of movies in the list. If you add heroine name then the list will be narrowed down. If you add director or producer in search criteria the list will be more shorter and at a point you will find the name of movie. The point will be more defined as you have certain input conditions. For example if steam is superheated then you should know the pressure as well as temperature to get the other properties like enthalpy, entropy, specific volume and other properties. In other words you need temperature and pressure to define the system at given point. If you are working with saturated steam then you need only pressure or temperature to completely define the system.