How do we create Analysis Sessions?

When you run a load test scenario, data is stored in a result file with an .lrr extension. Analysis is the utility that processes the gathered result information and generates graphs and reports.
When you work with the Analysis utility, you work within a session.
An Analysis session contains at least one set of scenario results (.lrr file).
Analysis stores the display information and layout settings for the active graphs in a file with an .lra extension.