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Diff Type: defines event by which changes in different versions of roster are calculated; one could choose check-in time (CI), check-out time (CO) or both (CICO), both check-in and check-out (CICO), duty start (DS) that is useful when the rule is related to reference activities. Last value is ignore when time event is not relevant.
Diff value: specifies the tolerance in minutes - if time of roster event (i.e. check-in time) is changed by more than this value in succeeding roster - that would qualify this change as a disruption. When diff type is set to ignore - diff value is not taken into account.
Time span: specifies the time in days - how long before the time of roster event (i.e. check-in time) can the roster be changed in order to avoid disruption. If roster is changed shorter ahead of its actual occurence - that would qualify this change as a disruption
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