Requirements
Before configuring the assignment object, make sure that the following information is satisfied:
- The Field Service component group is enabled. - For more information about the Field Service component group, see Siebel System Administration Guide. 
- A mapping of the server to the Field Service components and region exists. - For more information about Field Service components and regions, see Siebel Field Service Guide. 
- Employees are associated with service regions. - For more information about Field Service regions, see Siebel Field Service Guide. 
- The object that you are configuring for assignment availability has the necessary columns in its database table. - For more information about configuring for availability, see Extending an Assignment Object's Base Table for Availability-Based Assignment. 
By default, the Activity assignment object has the required columns in its database table for Start Time and Duration; however, one column must be extended if the Early Start Time property is desired. All other assignment objects must have their base tables extended if you want them enabled for availability-based assignment.
To configure assignment objects for availability-based assignment, you must perform the following tasks:
- Extending an Assignment Object's Base Table for Availability-Based Assignment 
- Configuring Assignment Object Properties for Availability-Based Assignment 
- Configuring Assignment Object User Properties for Availability-Based Assignment Note: It is recommended that you review the topics on extension tables and columns in Configuring Siebel Business Applications before completing this process.