Products > PSOP > Documentation Why aren't the availabilities shown in the cumulative resource usage plot? When viewing the resource usage plots for a single resource there is a black line indicating the availability of the resource over time. If "Cumulative" is selected in the resource selection box, usage and over-allocation are shown for all resources combined, but the black line indicating availability is not shown. This is because it is not clear what an availabilities line would mean on a cumulative plot. For example, suppose that on a given day we have 2 welders and 4 painters available, for a total availability of 6. If the work on that day requires 3 welders and 1 painter, the total usage is 4. If the availability was shown in the graph, it would look like there was no over-allocation, even though welders are over-allocated (3 are required and only 2 are available). PSOP will correctly show the over-allocation in red; showing the availabilities would therefore be confusing because you could see over-allocation below the availability line. Back to FAQ