5M model
{{Short description|Aviation risk-management model}}
File:The 5M model used for trouble-shooting.png
The 5M model is a troubleshooting and risk-management model used for aviation safety.{{Cite book|title=Commercial aviation safety |author=Cusick, Stephen K. |author2=Wells, Alexander T. |date=2012|publisher=McGraw-Hill Professional|isbn=978-0-07-176305-9|oclc=707964144}}{{Cite book|title=Improving Air Safety Through Organizational Learning: Consequences of a Technology-led Model|last=Ballesteros|first=J.S.A.|publisher=Routledge|year=2016|isbn=978-1-317-11824-4}}
Original labels
Based on T.P. Wright's original work on the man-machine-environment triad{{Cite book|title=Safety management systems in aviation|last1=Stolzer|first1=A.J.|last2=Goglia|first2=J.J.|date = 3 March 2016|publisher=Routledge |isbn=978-1-317-05983-7|oclc=944186147}} 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:
- Man (people): including the physiology and psychology of those involved, as well as their performance and proficiency.
- Machine (equipment): including the design, manufacture, maintenance, reliability, performance, etc.
- Medium / measurement (environment, inspection): including weather, terrain, obstructions, lighting, etc.
- Mission (purpose): the reason these three factors are brought together.
- Management (leadership): the prevailing supervisory approach in terms of regulations, policies, procedures, and attitude involved in establishing, operating, maintaining, and decommissioning.
Expansion
These have been expanded by some to include an additional three, and are referred to as the 8 Ms:{{Cite book|title=Reliability engineering: a life cycle approach|last=Bradley|first=Edgar|date = 3 November 2016|publisher=CRC Press |isbn=978-1-4987-6537-4|oclc=963184495}}
- Material (includes raw material, consumables, and information){{Cite book|title=Failure mode and effects analysis (FMEAs) for small business owners and non-engineers: determining and preventing what can go wrong|last=Weeden|first=Marcia M.|year=1952|publisher=Quality Press |isbn=0-87389-918-0|oclc=921141300}}
- Method / mother nature (process, environment)
- Maintenance
Other uses
This is also used in more general troubleshooting or root-cause analysis, such as with the Ishikawa diagram.{{Cite book|title=Job hazard analysis : a guide for voluntary compliance and beyond : from hazard to risk: transforming the JHA from a tool to a process |first=Nathan |last=Crutchfield |date=2008|publisher=Elsevier/Butterworth-Heinemann|isbn=978-0-08-055416-7|oclc=182759248}}
References
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