This jargon filled explanation perhaps requires explanation of Case Recoveries and Rules to Live by - just say so.... otherwise the quote gives an idea of broad requirements.
COE/Blue Water Certification Paddles Monthly June 2011
"...What are Event Factor (EF) and Combat Boarding Rate (CBR)? Event Factor measures the ability for the flight deck and air wing to work together to maximize lethality and survivability. Here is how it is measured over the course of a launch and recovery: Event Factor = (Total # of Launches + Total # of Recoveries)/(Minutes Elapsed)...
...As for Combat Boarding Rate (CBR), it is calculated by the number of traps divided by the total number of “attempted‟ traps with 90% being the goal for Case I/II and 85% for Case III. Both metrics are related to each other due to the fact that a bolter obviously hurts both your EF as well as your CBR.
Historically speaking, it tends to be a bit harder for Carrier Air Wings to achieve their Combat Boarding Rate numbers than Event Factor. Squadron LSOs need to train your Ready Rooms to consistently shoot for a 55-60 second interval vice 45 seconds, be very disciplined in the pattern, and to safely get aboard on the first pass while not violating the “Rules to Live By.”"
http://www.hrana.org/documents/Paddl...lyJune2011.pdf [no longer available]