This read-only Integer32 (1..65535) is an arbitrary index used to uniquely identify a QoS Shaper statistics entry, matching the same numbering scheme used in the shaper's current-bin statistics table. An admin uses this index to correctly match a shaper's historical bin entry to the corresponding interval type (such as 15-minute or 1-day) when reviewing past traffic-shaping behavior. When pulling last week's shaper history for a customer dispute, the admin filters on f3FpQosShaperHistoryIndex to isolate only the 1-day bins rather than mixing in 5-minute or rollover entries.