Aviation risk-management model
The 5M model is a troubleshooting and risk-management model used for aviation safety.
Original labels.
Based on T.P. Wright's original work on the "man-machine-environment" triad at Cornell University, the 5M model incorporates a diagram of 3 interlocking circles and one all-encompassing circle. The smaller circles are labeled "Man", "Machine", and "Medium"; the intersecting space in the middle, where they all meet, is labeled "Mission"; while the larger circle is labeled "Management":
Expansion.
These have been expanded by some to include an additional three, and are referred to as the 8 Ms:
Other uses.
This is also used in more general troubleshooting or root-cause analysis, such as with the Ishikawa diagram.
References.
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