As indicated by ITIL, an episode is a spontaneous intrusion to a service or a debasement in the nature of a service. What frequently decides the order of something as an occurrence is regardless of whether the service level agreement (SLA) was broken. Be that as it may, ITIL takes into consideration raising an occurrence even before a SLA has been broken so as to point of confinement or anticipate affect.
Kama ilivyoonyeshwa na ITIL, kipindi ni uvamizi wa moja kwa moja wa huduma au udhalilishaji katika asili ya huduma. Kinachoamua mara kwa mara mpangilio wa kitu kama tukio ni bila kujali kama makubaliano ya kiwango cha huduma (SLA) yalivunjwa. Iwe hivyo, ITIL inazingatia kuinua tukio hata kabla ya SLA kuvunjwa ili kufikia hatua ya kufungwa au kutarajia athari.