In the 90s and 2000s, there is so much dependency on networking that it has churned out lots of skilled professionals in this domain. These professional move in to other similar domains and reuse nomenclatures used in the networking domains. Example: the enterprise security companies seems to have significant influence from networking. Or, may be the networking brought in lots of hassles along with it's benefits. So, the networking experts recognized the trouble and started working on it's solutions. Borrowed word
PM: Performance Management (monitoring)
FM: Fault Management