5. WORKLOAD MODEL: User Session Duration in average. It is important to define the load levels that will translate into
concurrent usage, overslapping users, or user sessions per second.
6. USER SCENARIO: Navigational Path, including intermediate steps or activities, taken by the user to complete a task. We will
call it User Session from now on.
7. THINK TIMES: User thinktimes → Pause between pages during a User Session depending on the User Type*
18. Apdex Index
t = acceptable response time
satisfied = response time < t
tolerating = t < response time > 4t
frustrated = response time > 4t
Apdex [t] = (satisfied + tolerating/2)/total requests