To use production resources or tools (PRTs) in standard networks or networks, you must first define a usage for the PRT.
You can define different usages for the same PRT, for example, across applications.
Each usage that you specify must also be assigned to a task list type.
The usage key is relevant for the following production resource/tool categories:
SAP has predefined various usages.
For the Project System, the usage "network" is assigned the task list type "standard network". This assignment is also valid for networks.