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What is Behavioural Based Safety (BBS)?

wheelsleeperEssentially Behavioural Based Safety, commonly referred to as BBS, began existence as a suite of interventions heavily grounded in basic behavioural psychology. The sort of stuff the late Professor BF Skinner was famous for. We should not forget that BF spent most of his life working with rats. Indeed one of the most famous tools for assessing the outcomes of the behavioural model is known as the "Skinner Box". It is important we know and acknowledge the history of where BBS comes from. Having made those observations BBS works!

Yes, BBS is an effective tool (or more importantly suite of tools) that when implemented appropriately can have a significant positive influence on the safety outcomes within a business. It is critical though we do not try and think of BBS as some sort of "magic"; it is far from that. Implemented poorly it will surely result in a range of hazards being deliberately "hidden"; they are still there and they shall still bite you - one day.

You often hear behavioural safety advocates saying things like “ninety percent of your accidents are caused by unsafe behaviours; therefore if we can modify the unsafe behaviours we get rid of the accidents”. Now, this is actually nothing new. It is actually the work of H. W. Heinrich. Heinrich was an Assistant Superintendent of the Engineering and Inspection Division of Travellers Insurance Company during the 1930's and 1940's. Thus the claim that 90% (or a similar number) of injuries are due to unsafe acts is a “straight lift” of Heinrich's work.

Heinrich's conclusions though were based on poorly investigated supervisor accident reports, which pretty much held workers accountable for their own injuries; accident causation, as a science, did not exist at the time. Heinrich actually concluded that 88% of all industrial accidents were primarily caused by unsafe acts (his actual data only gave 70%). DuPont says that 96% of injuries and illnesses are caused by unsafe acts. Behaviour Science Technology (BST) has stated that between 80% and 95% of all accidents are caused by unsafe behaviour. When we really try and explore the science behind these claims we find a fair bit of “poetic licence” being used (To read more about this go to Presentations and review "Leading your Safety Culture toward Best Practice").

Managers like behavior based safety because it shifts much of the responsibility for health and safety to the workforce itself and does not require significant change in the work process, engineering design or management system.

Companies promoting behaviour based safety programs as the OH&S panacea claim the number of lost time injuries (LTI's) drop with these programs. Lost time accidents are known to be amongst the least reliable measures in determining the effectiveness of a health and safety program, since they are often highly dependent on a company's ability to put injured workers on light duty etc. The overt and covert manipulation of LTI data by people at all levels within a business is often frightening to behold.

Injuries and illnesses are caused by exposure to hazards. Hazards include any aspect of technology or activity that produces risk. Injuries and illnesses occur when our bodies come in contact with levels of energy or toxic material that are greater than the threshold which our bodies can stand. The greater the amount of energy or the more toxic the material, the greater the severity of injury or illness. The probability of incidents is mostly dependent on the duration and frequency of exposure. Of course there is a significant behvaioural input into this equation. My issue is it but one of many; the BBS community strongly assets it is really the "only one".

In 1950 the US National Safety Council began describing a hierarchy of controls to apply when reducing and eliminating hazards. The hierarchy is accepted globally. Proponents of behavior based safety programs can't really  support it because it contradicts thetheory that 95% of accidents are caused by unsafe acts of workers. Within the globally recognised Hierarchy of Control "training of workers" is at the very bottom. Within BBS it is near the very top.

Traditional behavior based programs often implement low level controls, rather than controlling hazards at the source. Let us consider a very powerful and emotive example. In the 1950's manufacturers bitterly fought passage of the US Refrigerator Safety Act which eliminated locks on refrigerator doors and established a very low amount of force needed to push open the door from the inside. The catalyst (or trigger event/s) was the death of significant numbers of young children! The manufacturers position was that these deaths were as a consequence of poor behaviour being exhibited by both parents and children. Kids were not being "trained" about the risks associate with playing around refrigerators and parents were not "supervising" as they should be. The US Refrigerator Safety Act passed in 1956. No child has died in a refrigerator designed since enactment of the this Standard.

SAFE T SOSI make the point again BBS works, but only when it is part of an organisationally appropriate cultural change program. There are some organisational environments where it will not have a significant influence. TransformationalSafety.Com is optimally placed to assess suitability for a BBS based solution; and to design a bespoke intervention that considers the unique needs, and maturity, of every unique safety culture.


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globeThe World of Safety is truly becoming a smaller place. We regularly provide our unique and powerful safety services to clients throughout the global safety community. We look forward to serving you...


Thirty two years since Bhopal, thirty years since Chernobyl, twenty eight since Piper Alpha and what have we learned? 

Not much. After all, we have seen Texas City, Macondo, the Soma mine collapse, the Lac-Mégantic rail disaster, and the list just goes on - all in the last ten years or so. Clearly what we have been doing has not been working. 


The time has come to take some real responsibility, and put some science back into safety. The time has come to transform your safety culture. The cost of not doing anything shall be further death and injury.

Just a few businesses we have supported


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essar BMA Fosbel Goldfields Vesuvius
TWS Amcor Murry and Roberts Foseco Saudi Aramco
Rio Tinto Ambos Vale bhp logo Shell
Telstra Masterfoods    QBE Duke  GlobalHSE