In general:
6-20% performance improvement
ref: UK HSE Factoring the Human Vol: 3 of 3 P3 1.2.2
In civil aviation:
A 54% decline in human error
Offshore helicopter community after introduction of Crew Resource Management training
Post HF programme surveys showed an 8% reduction in quality lapses and that as a result of training 88% of people have enhanced safety awareness, 77% will now openly report (incl. near-miss). This in a Part 145 AMO, aircraft maintenance operation
In shipping and offshore oil:
Reduced accidents by 1/3, Maersk shipping and oil rig operations
ref: UK HSE Factoring the Human Vol: 3 of 3 P3 1.2.3
Maersk obtained a 15% reduction in insurance premiums
In the rail industry (Australia):
SPADS (Signal Passed At Danger) Reduced by 50%
NO HF/ RRM training 26.32% drivers (first 12 months) had a
SPAD
HF/ RRM training 13.71% drivers (first 12 months) had a SPAD
ref: Queensland Rail 2012
In Military aviation:
CRM (HF) training decreased the accident rate by 81% for US
Navy A-6 Intruder ground attack jet bomber crew members. Diehl
1991.
Improved performance by 6%-20% was shown after HF training by
studies involving military pilots, Salas & Fowlkes 1997.
In medicine:
South Carolina Hospitals Association, within 90 days of human
factors training and using a simple visual check, achieved a 90% reduction in miss-labelled blood specimens, this shortly
increased to 93%
Regarding checklist usage,
The average reduction in (hospital) complications was 35 per cent
the average reduction in deaths was 47 per cent.
Reith Lecturer 2014: Atul Gawande.