Metrics  for  cloud  computing  services  can  be  described  using  the  model  proposed  in  this document.  The  model  represents  the  information  needed to  understand  the  targeted  cloud 
property and which constraints should be applied during observation. The Cloud Service Metric model (CSM) describes the higher level concepts of the abstract metric definitions for a specific 
cloud  service  property;  service  uptime  is  a  prime  example.  Definitions  for  abstract  metrics contain parameters and rules to express a formal understanding the property of interest. The CSM 
model  also  contains  concrete  metric  definitions  that  are  based  on  abstract  metric  definitions. 
Concrete  metric  definitions  add  specific  values  to  rules  and  parameters  that  make  the  metric usable for a given scenario.