Understanding usage profile is about knowing what operations, # concurrent operations and rate of arrival at a point in time.
Understanding the rate and number of transactions probably on a real system is critical to ensure that the system is designed well and later sized and deployed well. Different end users may use the system differently in terms of what they use, frequency of usage and how they value each feature.
For a given mode, identify the end users types and their key operations and then identify the number of users for each type of user and then identify the rate of arrival of transaction. This is achieved by applying a core concept in HyBIST “Operational Profiling”. Employing this core concept allows us to think better and ask specific questions to understand the marketplace and the usage profile in a typical and worst-case scenario.