Some light reading for you guys....
Stopkotte, Jack. “Minimizing Costs While Maintaining Performance Margins, Part 1 — Lowering Costs and Improving Reliability.” GE Aircraft Engines, September 2003. (If you can find a copy....)
"When less is more" - Aerosafety World magazine
Statistically, utilising the minimum Perf A compliant takeoff thrust makes you 5x less likely to have an engine failure, along with significant cost savings in engine wear...