The One Call Per Sub-Callout rule prevents employees from being called multiple times on the same sub-callout; meaning, if an employee’s name appears on multiple sequences within a chained list, the employee will only be called on the first sequence they are on. With this rule employees will be called on other sub-callouts they are on.
The Line Worker list is chained to the Lineman list. When a callout is created requesting one employee from both lists (the Lineman and the Line Worker), an employee who is on both the Lineman and Line Worker lists will be called on the Line Worker list sub-callout and the Lineman list sub-callout but will not be called on the Line Worker lists that is chained to the Lineman roster.
The sibling callout rule is used in most cases to speed up callout times by assuming an employee will not respond when called again because they were already called once for the position. Employees can still call inbound to accept the missed called if the job is still available.
Note: If a roster is chained to itself within the same sequence, the one call per sub-callout rule will be ignored when calling the duplicate sequences.