Workload vs Capacity Thresholds

No task assignment

No workload will be displayed when a resource is not assigned to any tasks.

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Task assignment exists

Standard

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Custom 

BigPicture Enterprise feature → coloring rules can be defined only when using the BigPicture Enterprise add-on.

Levels and colors of the grid in the Resources module depend on Box type settings (Administration> Box type configuration > Resources > Coloring rules) and can't be adjusted for an individual Box.