A worker is assigned work in Work Year portions. If a worker is tasked on a project with 0.5 work years then this means that the worker will use half of his workload to accomplish it.
At no time should a worker be assigned more than 1 work year overall; if a work year has 1.25 Work Years assigned then they are over tasked.
Projects have a "Start Date" and an "End Date". I would like to create a Step Line chart that shows the amount of work assigned to a worker at different dates. If a new project starts, then the sum of assigned work years goes up. If an old project ends, then the sum of assigned work years goes down.
I have attached an image that demonstrates what this might look like; I did not create this example chart using Nevron, I just modified a screenshot of a Nevron Chart using MS Paint. I have also attached an image of some sample data; this is not the same data that is used in the image, but it would suffice for the creation of a chart.