Complex sentence: Control functions enable a permanent adaptation of the scheduled staff to the actual requirements, i.e. the optimisation process allows for manual data adjustment, e.g. in case of short-term fluctuations in demand or unscheduled employee absences.
Split into simpler sentences: Control functions enable a permanent adaptation of the scheduled staff to the actual requirements. In other words, the optimisation process allows for manual data adjustment in the case of short-term fluctuations in demand or unscheduled employee absences.