Modeling grid projects is provided. A prediction of processor and network availability in a grid computing system are identified during a period of time. A grid project description model is generated utilizing a modeling language designed to describe phases of the grid project. The grid project description model is processed to determine an amount of processor and network resources needed for execution of the grid project. A graph is generated including a first curve representing the prediction of processor availability and a second curve representing the prediction of network availability. A simulation of execution of the grid project is generated based on the prediction of processor and network availability. A plot of utilization of processor and network resources required to complete execution of the grid project is added to the graph while keeping utilization of processor resources within the first curve and utilization of network resources within the second curve.