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How was human factors the cause of an accident - recovery plan
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To add to a behavioural safety program as previously stated, I have seen several reports of how human factors combined with design and procedures have caused accidents, namely Chernobyl, Piper Alpha etc as two hi-profile ones, has any one actually investigated an accident where human factors/human behaviour have been part of/main cause? What actions were taken? Shortened versions suitable for ease of replies. Thanks Stuart
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Rank: Super forum user
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FLT hit pedestrian. Marked crossing point was 15m further away. Pedestrian chose to ignore safety instruction, driver did not expect a pedestrian there. Positioning of crossing point flawed and did not anticipate behaviour. Redesign introduced mandatory stop, mirror and partial demolition of a wall.
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Rank: Super forum user
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The place to start in understanding this topic is HSG48 "Reducing error and influencing behaviour" (available from the HSE website) which I highly recommend. It includes case studies.
I imagine accidents that didn't involve human factors are extremely rare - if indeed one has ever occurred.
The HSE report "Buncefield: Why did it happen?" is also a very good and readable example.
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Kate Thanks for the information, it is a very deep topic. I have the HSG48 book, I myself using this for reference as it starts off very well in Ch1 about what are human factors to Ch6 and the case histories. The Buncefield report is good, a bit long with all the recommendations but easy to see how one thing leads to another and then 'bang'. Many thanks for the input. Stuart
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Rank: Forum user
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Stuff4blokes Some people may say 'should have used common sense' and used the crossing but as we all know not every one has the same 'common sense'. Which is why I try and avoid saying it. Good example of what really did happen with action plan. I shall remember that one and try and use it as an example if you have no objections. Thanks Stuart
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Rank: Super forum user
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I agree with Kate, in that most if not all incidents are related to human factors (ergonomics) and/or human error. Basically there are two genres of human error - the immediate and the underlying causal factors, sometimes described as active and latent failures. The first type is associated via the 'trigger' effect and is prevalent in all accidents. The second type is usually associated with more serious and complex incidents.
An excellent book on the causes, influences and cultural factors of accidents is: Accident and design - contemporary debates in risk management: Hood C. and Jones DKC.
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Rank: Forum user
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Distribution - Lorry hit pedestrian whilst reversing. Pedestrian on marked walkway. Lorry driver reversed on walkway rather than follow the one way system and drive round the yard again. Investigation identified lack of training of driver (3rd party) on site rules. Also identified some agencies more proactive on H&S in ensuring their drivers trained on site rules. Outcome - logistics dept ensured in house and 3 party trained to same standard.
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Rank: Super forum user
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Another one to ponder: Contractors finished a welding job on a tank on a chemical plant early and started the 2nd tank. Sadly the 2nd tank had not been cleaned yet, no PTW issued and the sparks ignited residues, resulting in an explosion, killing both the welder and his mate. The assumption was that the welders were looking to speed up the job to be helpful. Chemical company heavily fined in Crown Court for allowing the unsafe work to progress. They did not take in to account that human behaviour could circumvent their PTW procedures. The irony was that this took place whilst a corporate safety audit team was on site!
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Rank: Super forum user
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Look at Flixborough Inquiry Report
Managers decide to remove reactor and install dog leg pipe - No Mechanical Design experience as Mech Eng Director recently left to pursue other interests. Designed on workshop floor and no thought given to supprting this mere 27 inch diameter stainless steel beast some 15 meters long.
We are in danger of concentrating too much on operative actions. Most operatives end up doing things because this is what managers have presented them with and so it is OK.
1) Manager did not think operastives would take a short cut to the job across a Victorian wrought iron bridge that was damaged.
2) Manager did not consider that pedestrians would want to cross a road when he removed the pedestrian crossing and installed no temporary replacement - a motorway slip road
Bob
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Rank: Guest
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Stuart
If you want to address 'human factors' (i.e. links between thoughts, emotions and actions) in relation to safety at work, relevant research has enlarged greatly beyond ergonomics and behavioural safety, although this may seldom reach the safety magazines.
What's called a 'socio-cognitive' approach has been tested by several smart researchers: Dov Zohar, in Israel, and Sharon Clarke, in Manchester Business School, are two who write about it very clearly. What they can enable the safety professional to do is the measure perceptions of employees across an organsiation on two sets of influences on safety performance: senior management's prononcements, policies and procedures (or silence and absence of policies and procedures, on the one hand, and the actual practices of supervisors and operational managers. The ratings of employees provide a telling portrait of the safety climate overall and the safety sub-climates in different parts of an organisation.
This data is a necessary corrective where a safety professional gets excited about 'human factors' and 'ergonomics', gains investment ££ for these disciplines and ends up 'in stuck' and/or covering up because he has simply failed to gather and report reliable data about the powerful safety climates.
Perhaps I should add that as a registered member of the IEHF, I also advocate 'human factors' where and to the extent that it's appropriae. Where funds are limited, an ergonomic intervention is at times far cost-effective than gauging the safety climate validly and reliably and ensuring that management receive a report on their responsibilities as shown by these datga.
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Rank: Forum user
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RayRapp Thanks for the info. I shall also look into the reading material, sounds interesting. Regards Stuart
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Rank: Forum user
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CRNBaker Good example. Always a need to separate vehicles and pedestrians. Regards Stuart
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Rank: Forum user
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Stuff4Blokes Like you say, some workers think they are helping to make quick work of a situation only to end in a disaster. Thanks Stuart
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Rank: Forum user
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Boblewis I can see your point in that managers think they are saving time and money by doing what you have stated, or by being just stupid. Thanks for a different view of how things go wrong. Stuart
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Rank: Forum user
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KieranD Thats quite a different view on human factors. I am interested in all views especially as this is such a wide subject. I shall look into what you have commented on. Thanks Stuart
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How was human factors the cause of an accident - recovery plan
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