ZID controller experienced operational error at FL315 when aircraft did not climb as expected.

Attributes
ACN	613812
Time
Date	200404
Day	Thu
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : zid.artcc navaid : hvq.vortac
State Reference	IN
Altitude	msl single value : 31500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zid.artcc
Operator	common carrier : air carrier
Make Model Name	EMB ERJ 145 ER&LR
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	climbout : intermediate altitude
Route In Use	departure : on vectors
Flight Plan	IFR
Aircraft 2
Controlling Facilities	artcc : zid.artcc
Operator	common carrier : air carrier
Make Model Name	B757 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	cruise : level
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : supervisor
Experience	controller non radar : 2 controller radar : 32 controller supervisory : 20 controller time certified in position1 : 33
ASRS Report	613812
Person 2
Affiliation	government : faa
Function	controller : radar
Events
Anomaly	conflict : airborne less severe non adherence : required legal separation
Independent Detector	atc equipment : conflict alert
Resolutory Action	none taken : insufficient time
Consequence	faa : investigated
Miss Distance	horizontal : 24000 vertical : 1600
Supplementary
Problem Areas	Aircraft Flight Crew Human Performance ATC Human Performance
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

Aircraft #1 was being climbed and vectored to avoid aircraft #2. Aircraft #1 miscalculated the rate of climb which influenced the controller's decision to not vector further away from traffic. Controller felt deceived by poor pilotage.

Original NASA ASRS Text

Title: ZID CTLR EXPERIENCED OPERROR AT FL315 WHEN ACFT DID NOT CLB AS EXPECTED.

Narrative: ACFT #1 WAS BEING CLBED AND VECTORED TO AVOID ACFT #2. ACFT #1 MISCALCULATED THE RATE OF CLB WHICH INFLUENCED THE CTLR'S DECISION TO NOT VECTOR FURTHER AWAY FROM TFC. CTLR FELT DECEIVED BY POOR PILOTAGE.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.