Citation Excel (C560XL)
Air Traffic Control Fully Certified
Air Traffic Control Time Certified In Pos 1 (yrs) 11
Situational Awareness
ATC Issue All Types; Inflight Event / Encounter CFTT / CFIT
Air Traffic Control Issued New Clearance
Procedure; Human Factors; Airspace Structure
Aircraft X descending into MSN from the northwest; initially issued 4000 ft. to stay above MVA (Minimum Vectoring Altitude) of 3200 ft.; aircraft still high 25 NM northwest; out of 8000 ft. aircraft issued 3000 ft.; anticipating would NOT be below 3200 ft. while still over that MVA area; however aircraft descended faster than expected and was observed at 3000 ft. at the very southeast portion of the 3200 ft. MVA where transitions to the 2700 ft. MVA. Weather in area better than 5000/5. C56X can perform very differently depending on flight crew and experience; in the future I won't anticipate quite as soon and observe how aircraft is performing initially.
A TRACON  Controller reported aircraft was issued a descent clearance; descended faster than anticipated and flew below the Minimum Vectoring Altitude.