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ALARP for Engineers

Steven Jones920

Hi all,

the IMechE have published (in 2024) a document titled 'ALARP for Engineers: A Technical Safety Guide".

It's a really useful document that I am finding helpful in our support to our customer. Does anyone know if there is any other equivalent documents produced by any other Institutes (IET would be great) that will help in application of Safety Techniques for complex systems that include Software and Humans in the loop?

I am also starting to look into STPA (I'm a Tim Kelly disciple, so working on Nancy Leveson processes feels disloyal, lol). I have the STPA handbook (all 188 pages of it). Can anyone recommend any additional resources that would help develop capability in this area please? it seems that a step change in how we perceive Hazards and Risk is both required and inevitable. Applying a top level Safety Target to a lower level system is driving me mad and STPA changes the approach of quantification of hazards to be far more sensible and manageable from a System level point of view. 

Many Thanks,

SJ

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    Steven Jones920 said:
    it seems that a step change in how we perceive Hazards and Risk is both required and inevitable

    Have a look at Black Swan Events.

    Are they rare or just Poor planning with outdated information. 

    It is wrong to think that a 100-year storm happens only once every 100 years. While not likely, two 100-year storms can occur within a week of each other.  The concept is a major event/disaster  only happens 1 in 100 years thus 1%

    Maritime insurance can attest to this.  We now have more frequent storms that are more violent and thus creating more destructive damage which has a COST to the insurance industry.   Thus 1% probability has risen to 5%.  This needs to be reflected in insurance premiums and also the value of reserve fund that is  needed to be maintained for such events.  

    Consider Great storm of 1987 in UK

    Highest winds    86 mph (139 km/h)[1]
    Highest gusts    134 mph (216 km/h)[1]
    Lowest pressure    953 hPa (mbar); 28.14 inHg[2

    Estimated insurance cost £2 billion (7.106 today)



    Storm Ciara (February 2020):
    One of the most powerful storms of the decade, causing significant damage and widespread disruptions.


    Storm Arwen (November 2021):
    A red alert was issued for winds, causing substantial damage and disruption.


    2024 Storms:
    Record-breaking payouts were recorded due to consistent bad weather throughout the year, leading to extensive damage to homes and businesses

Reply
  • 0
    Steven Jones920 said:
    it seems that a step change in how we perceive Hazards and Risk is both required and inevitable

    Have a look at Black Swan Events.

    Are they rare or just Poor planning with outdated information. 

    It is wrong to think that a 100-year storm happens only once every 100 years. While not likely, two 100-year storms can occur within a week of each other.  The concept is a major event/disaster  only happens 1 in 100 years thus 1%

    Maritime insurance can attest to this.  We now have more frequent storms that are more violent and thus creating more destructive damage which has a COST to the insurance industry.   Thus 1% probability has risen to 5%.  This needs to be reflected in insurance premiums and also the value of reserve fund that is  needed to be maintained for such events.  

    Consider Great storm of 1987 in UK

    Highest winds    86 mph (139 km/h)[1]
    Highest gusts    134 mph (216 km/h)[1]
    Lowest pressure    953 hPa (mbar); 28.14 inHg[2

    Estimated insurance cost £2 billion (7.106 today)



    Storm Ciara (February 2020):
    One of the most powerful storms of the decade, causing significant damage and widespread disruptions.


    Storm Arwen (November 2021):
    A red alert was issued for winds, causing substantial damage and disruption.


    2024 Storms:
    Record-breaking payouts were recorded due to consistent bad weather throughout the year, leading to extensive damage to homes and businesses

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