In today's IT infrastructures, there is increasingly a large number of hardware and software components to monitor. To be effective, it is important for administrators to quickly assess the real impact of incidents. Hence administrators need to avoid/limit false alerts. Additionally, when incidents arise, they should quickly evaluate their impacts so to be able to prioritize the recovery from incidents that have higher impacts on services. That are crucial points that need to be addressed in demanding operations environments. In this talk, we will present how to achieve this purpose by focusing on high level services (business processes, services provided to end-users), instead of on individual checks. Our explanation will be guided by examples set up on top of Nagios thanks to RealOpInsight . Business process-centric, RealOpInsight enables the network administrators to focus on useful alerts. Indeed, thanks to its high-level hierarchical organization of services along with advanced rules and algorithms to aggregate and propagate incidents, they are able to handle the severities of incidents in a fine-grained way.