Most ergonomic assessments end in a PDF. Somebody reads the executive summary, 2 chairs get replaced, and the document goes into a folder where it satisfies an audit question for 3 years.
That is not a control. That is a receipt for having looked.
What the evidence actually supports
The participatory ergonomics literature is more encouraging than the average assessment deserves.
9 of the 10 studies
Participatory ergonomics studies reporting positive health effects
30% reduction
Sustained reduction in soft tissue injuries at an Ontario utility
9 of 10 studies reported positive health effects. An Ontario utility recorded a sustained 30 per cent reduction in soft tissue injuries. So the discipline works. The gap is between what the discipline can do and what an assessment delivered as a document does.
The word doing the work in "participatory ergonomics" is participatory. The studies that report gains involve the people who do the job in identifying the problem and choosing the fix. An assessor who visits, measures, leaves and emails a report has skipped the mechanism.
5 things a report has to contain to be worth its fee
Measurements, not adjectives. "Excessive reach" is unfalsifiable. "Reach of 71 cm to the far bin, against a recommended maximum of 45 cm for repetitive work" can be checked by anyone with a tape measure, including the person who has to approve the spend.
The task as performed, not as documented. Standard operating procedures and actual practice differ on nearly every site. If the SOP says 2-person lift and the crew does it single-handed because the second person is at the other end of the aisle, the assessment has to describe the single-handed lift. Assessing the SOP is assessing a document.
Findings ranked by exposure. Number of people affected, multiplied by frequency. Ranking by cost instead is how a cheap fix that helps 2 people ends up above the one that helps 40.
An owner and a date on every action. Not "consider adjusting shelf heights." A name, and a date. An action with neither belongs to nobody and happens never.
A follow-up visit already booked. This is the one that gets cut, and it is the one that converts the report into a control. Somebody has to come back and establish which of the actions actually happened, because a meaningful fraction of them will not have.
The uncomfortable finding of a follow-up visit
Roughly, on a first return: the free changes are done, the changes needing a purchase order are in progress, and the changes needing an engineer have not started. That distribution is not a sign of a bad site. It is what happens when a list of recommendations meets a capital process.
Knowing it is what lets the second-round list be honest. The 3 items that need a millwright get escalated as capital items with a business case, rather than being reissued as recommendations that will be ignored a second time.
Where ergonomics stops and capacity starts
An ergonomic assessment describes the demand side: what the work asks of a body. It says nothing about the supply side - what the bodies doing that work can currently tolerate.
2 sites with an identical reach problem will have different injury rates depending on the capacity of the crews working them. That is why we run ergonomic assessments and capacity measurement as separate services with separate outputs: one lowers the demand, the other raises the tolerance, and knowing which of the 2 your site needs requires measuring both.
The 5 report requirements are our own standard. The 2 figures cited are published research findings, linked to their sources, and neither is a wereset result.
