As seen in the previous chapter, while passive monitoring of business functions provides an intrinsic view of the business services vis-a-vis the IT infrastructure, it fails to provide a measure of the customer experience. It also does not indicate any service failure during off-peak hours if there is no load in the system and the system-based metrics may not show any abnormality. Passive monitoring also does not indicate any measure of the user experience of the same business function from different geographical locations. To overcome these disadvantages of passive monitoring, the business services can be modeled using active monitoring techniques. This section provides a detailed discussion on active monitoring.