Metric Name: Type-P-APM-Availability Metric Definition: This metric characterizes the availability of a network service by measuring the percentage of successful transactions the network service delivers over a given time interval. This metric is calculated by first measuring the IPPM metric 'Type-P-Interval-Bidirectional-Connectivity' for the interval starting at the instant 'Src' initiates a transaction of Type-P with the 'Dst' host, and ending at the instant the last packet of the transaction has been received. In addition to successful connectivity over this interval, the particular application request must also succeed, for a transaction to be considered successful. If either condition is false, then that transaction is considered to be unsuccessful. The derived metric is defined as the total number of successful transactions between Src and Dst, divided by the total number of transaction attempts between Src and Dst, during the time interval dT. Metric Parameters: Src, the network address of a host Dst, the network address of a host dT, a time interval Metric Units: Percentage Mapping of Type P: Type P refers to an application protocol encapsulation, identified by a specific protocolDirEntry. Metric Type: connectMetric(1) Metric Dir Type: twoWay(2)