Data for Production Resources/Tools 
Definition
Basic data and default values that you can maintain for PRTs have either a material master record or a PRT master record.
Structure
Basic data
Basic data is general information about the production resource or tool. Important basic data includes the task list usage and the requirement record indicator.
The task list usage specifies where production resources can be used (for example, in a routing or in a standard network). Depending on the task list usage you entered, you may only be able to assign the PRT to certain task list types.

Requirement records and their evaluation are not yet available.
Default Values
When creating PRT master records, you can maintain default vales that are proposed when you allocate the production resource to an activity.
You cannot maintain default values for PRTs with document info records.

Default values which you have identified as non-changeable in the material or PRT master record cannot be changed in a standard network or network.

Drill bit no. 230 must be available five days before the activity "assembly" starts. You enter a time interval or offset of 5- for the start offset. The system calculates the new start date and the duration of PRT usage from the earliest start date of the activity.