Correlation method is
used for handling the dynamic content using HP Load Runner. Dynamic content
refers to page components which are dynamically created at the time of every
execution of business process and always different from the value generated in
previous runs. It is basically a unique value.
For Example:
Dynamic
value or content includes the transaction
id in an online banking application or when an agent report is creating report for his client and report
is generated successfully, a report number is generated which is a unique value for that particular report.
This unique id can be seen in the script after the
end of creation of report. These dynamic values or contents are a part of the
server response. If that id is in their script, then you have correlated this.
You can check it in server response of the script.The Load Runner usually
identifies these on the basis of the left and right boundaries and ordinal
identifiers.
Correlation automatically inserts Load Runner commands to
parameterize the dynamic contents it identifies in the server response.
Thus during recording, you should have some idea where a unique id will be
generated for what.