Enroute controller described a loss of separation event; the reporter noting that had his/her initia...

Narrative:

A C550 departure was requesting FL380 came from the previous center climbing to FL340. A crj arrival was descended to FL330 on contact for traffic. I called the neighboring sector and stopped the C550 at FL320 for the crj. Approximately 2 minutes later the C550 was level at FL320 doing 255 KTS indicated. The crj was doing 462 KTS indicated. I ran out the vector lines and there appeared to be 7 miles between both aircraft. I put a halo on the C550 and I decided to climb the C550 to FL340 and descend the crj to FL300. After the climb clearance was issued I observed the aircraft merging faster than expected; I issued the C550 a 15 degree left turn and reaching FL340 cleared back to original course. Recommendation; I should have either stuck with my initial decision to let the two aircraft pass over each other or made an effort to swap the aircraft out two minutes prior instead of waiting until they were as close as they were. I also should have turned the crj and expedited him down; when I realized there was going to be a loss of separation.

Original NASA ASRS Text

Title: Enroute Controller described a loss of separation event; the reporter noting that had his/her initial plan and/or altitude been used no error would have occurred.

Narrative: A C550 departure was requesting FL380 came from the previous Center climbing to FL340. A CRJ arrival was descended to FL330 on contact for traffic. I called the neighboring Sector and stopped the C550 at FL320 for the CRJ. Approximately 2 minutes later the C550 was level at FL320 doing 255 KTS indicated. The CRJ was doing 462 KTS indicated. I ran out the vector lines and there appeared to be 7 miles between both aircraft. I put a HALO on the C550 and I decided to climb the C550 to FL340 and descend the CRJ to FL300. After the climb clearance was issued I observed the aircraft merging faster than expected; I issued the C550 a 15 degree left turn and reaching FL340 cleared back to original course. Recommendation; I should have either stuck with my initial decision to let the two aircraft pass over each other or made an effort to swap the aircraft out two minutes prior instead of waiting until they were as close as they were. I also should have turned the CRJ and expedited him down; when I realized there was going to be a loss of separation.

Data retrieved from NASA's ASRS site as of April 2012 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.

Attributes
ACN	980771
Time
Date	201111
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZ.ARTCC
State Reference	US
Aircraft 1
Make Model Name	Regional Jet 900 (CRJ900)
Operating Under FAR Part	Part 121
Flight Phase	Descent
Flight Plan	IFR
Aircraft 2
Make Model Name	Citation II S2/Bravo (C550)
Operating Under FAR Part	Part 91
Flight Phase	Climb
Route In Use	Vectors
Flight Plan	IFR
Person 1
Function	Enroute
Qualification	Air Traffic Control Fully Certified
Events
Anomaly	ATC Issue All Types Deviation - Procedural Published Material / Policy

Enroute controller described a loss of separation event; the reporter noting that had his/her initial plan and/or altitude been used no error would have occurred.