CCMSPING: Availability <100% in RZ20

Hi veryone!

I know this could seem a silly question, but I can´t find a good explanation for that.

We have correctly installed the CCMSPING in our SOLMAN, so we collect centrally in the RZ20 of our SOLMAN availability data from all our Satellite Systems.

The question is that sometimes the Availability MTE which should be 100% for all the Satellite System in which there has been no interruption, I encounter values lower than that. For example 73%. 65%,etc...

I could understand that if the system has recently been down, this alert would show an average value, so it would not be nor 100% nor 0%. But the case is that the system are running OK for weeks, and the only explanation for not having a 100% of availability is that some network problems prevent the CCMSPING from collecting some values, and that could lower my percentage.But a network problem would affect not only the CCMSPING, but also the users, and nothing like this has been detected.

Has anybody else detected this?

regards

Antonio