In a WBS, you can link activities to a calculation group for the scheduled unit and you can enter a forecast quantity. You can use quantity types to define the character of the activity in more detail. You can use these quantity types in the WBS:

• Provisional quantity - The forecast quantity for the WBS line is defined but flexible and can be exceeded. You can invoice the exceeding quantity and amount with the progress bill.
• Firm quantity - The forecast quantity for the WBS line is fixed and cannot be exceeded. To change the quantity, use a project change order.
• Information - The WBS line doesn't have a scheduled unit, forecast quantity, nor estimate lines. The WBS line is part of the WBS to hold notes or information.
• Global price - Quantities are not relevant for the WBS line, only the total price is relevant. The quantity is 1 for this type of WBS line.
• Provisional sum - The price is not calculated but defined upfront by the customer. The bid rate is used to enter and lock the price. Indirect costs allocation is not allowed for the WBS line.

Standard procedure

1.	Click Advanced project management.
2.	Click Quantity validations.
3.	Click New.
4.	In the Quantity type field, type a value.
5.	In the Description field, type a value.
6.	In the Validation type field, select an option.
7.	Click Save.
8.	Close the page.