1). Smarts will calculate a devices interface utilization and make this calculation available for collection.
2). To calculate a devices Interface utilization Smarts will use incrementing counters (either 32 or 64 bit). With this information it will pre-format and make the values available via the API as a rate (which is the difference between two points in time).
3). The Smarts Collector within M&R will then Collect these values from Smarts. There is no further calculation made within M&R on these Interface utilization values.