Answer: Maintenance
Step-by-step explanation:
Maintenance stage in system's life-cycle is defined as the phase which is responsible for evaluating the performance of system in continuous manner so that it can work without facing any obstruction. It manages and facilitates the system by providing updates, resource,requirement and other tools so that system's execution can work.
It might be considered as low glamorous system because it does not attracts the information system professionals but it acts with the huge responsibility of running and processing operations the system.