If the time is not synchronised on all the IT systems within an information domain, the log data they produce may not correlate, and attempting to correlate it may result in erroneous statements. This is due to the lack of a common basis for the different time stamps of events. It is thus harder to assess collected log data where there is no time synchronisation, particularly if the data is stored on a central log server. Furthermore, a lack of proper time synchronisation may make it impossible to use logs in securing evidence.