Different organisations account for people costs in different ways. With OnTheSamePage, you have the option of recording an hourly cost for the people that you use on the project. This cost can be different for each person, and can be different for each project that someone works on. Or you can leave it alone if you don't record people costs.
If you do record people costs, the actual costs are automatically calculated based on timesheets completed. Future forecasts are based on who is forecast to be doing the work, their cost for work done on this project and their accuracy to estimate. In this way, people cost forecasts become very accurate over time and the Project Manager doesn't have to estimate people costs. OnTheSamePage does it for you.