The call horizon specifies as a percentage when a
maintenance call object (for example, a maintenance order) should be created for a calculated maintenance date, that is, the time interval between the confirmation date or start date and the next planned date of a maintenance plan until the maintenance order is created.You can define a specific call horizon for a time-based or performance-based maintenance plan by entering a percentage of the total maintenance cycle. When you schedule a maintenance plan, the system calculates the next planned date.

The total maintenance cycle is 250 days. If you define a call horizon of 0%, 80% or 100%, the system creates the maintenance order according to the following number of days:
0 % |
Immediate call |
80 % |
Call after 200 days (= 80% of 250 days) |
|
The start date is April 1, 1995. The maintenance order will be created 200 days later, on November 17, 1995. | |
100 % |
The call is only made once the planned date has been reached |

You cannot define a call horizon for a multiple counter plan. To ensure that a maintenance order is created before the order start date is reached, you must specify a preliminary buffer in the scheduling parameters. To do this, enter how many days before the start date the maintenance order should be created.
You should always specify a call horizon for performance-based maintenance plans.