The PTB provides information about the resources required to perform the tasks.
Each resource has a specific name. The availability of each resource (number of units) may be fixed in some scenarios or may vary by allowing the user to hire and fire workers (or any other resource).
The availability of resources may be deterministic (each resource unit is available every time period with complete certainty) or stochastic (each resource unit is available every time period with a given probability).
The cost of resources is an important factor for project planning.
Figure 5: the resources information screen with a single resource type
This cost of resources includes the cost per time period (or per day) that the resource is performing a task and for some resources it may include the cost per time period that the resource is idle (not assigned to any task) (see Figure 5):