Grey rating for Earlywatch Alert report

Sometimes it is common situation that you receive the latest Earlywatch Alert (EWA) report from SAP and some of checks included have grey ratings. Usually there are suppose to be just three types of ratings:

Green – no major problems with systems observed, hurray :-)

Yellow – improvements to the system were detected

Red – severe problems were detected, you should take corrective actions immediately

Then what is going on while grey traffic lights are delivered? Simply this means that automated system that was generated this EWA report had no enough data to analyze the system. E.g. situation occurred in your system that it wasn’t recognized, connection into system was down, system as itself was down etc. There is an SAP Note discussing such situations here:

Note 762696 - Grey rating for Earlywatch Alert