The total number of items that are required. For example, the number of employees or contractors required for the trade, or the number of tools.

The amount of time for which each employee, contractor, tool, or service person is required. For example if you are entering a trade requirement, enter how long each employee will need to work on this task. The total time entered for the requirement will be calculated as:
Number Of x Scheduled For

Start to start (SS): The requirement starts when the task is planned to start, offset by any entered lag time.
Finish to finish (FF): The requirement ends when the task is planned to end. The system automatically calculates the required lag time.