Your Reliability Engineering Professional Development Site
For the month of September, I thought it would be appropriate to write a post on Terrorism Risks.
Since 2001, there have been an average of 5 attempted terror attacks annually in the U.S. that have resulted in arrests, trial, or raising of the DHS threat level. Now you know what changes the threat level at the airport.
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The calculation of reliability consists of the comparison between stress and strength. If we consider stress and strength as deterministic quantities, failure occurs when the stress exceeds strength. In reality, stress and strength are stochastic variables (Figure 1a). If the two curves overlap (Figure 1b), failure may occur. Let us suppose that s and S are continuous random variables with probability density functions f(s) and f(S), respectively.
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You will find example process diagram layouts with the most effective flowchart templates to use, what to include in them so that the flow chart drives business results and personal performance (and you will be surprised at how easy they are to create). With the right layout and the inclusion of ACE 3T (Target-Tolerance-Test) quality assurance standards your process flowcharts and procedures will drive business and workplace performance. First it is necessary to layout your flowcharts so it is totally clear what must happen in a process or procedure, who is responsible to make it happen, and how their performance will be measured.
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In CERM Risk Insights #354 I discussed the risk management study of local governments in New Zealand. One of the cases in the study was Environment Canterbury Regional Council. The regional council’s focus and the increasing concerns about environmental risks by both the public and private sector represents a challenge to the common approach used by most of the New Zealand local governments, ISO 31000:2018 and the International Organization for Standardization (ISO) more generally. This piece discusses this challenge to ISO 31000:2018 and its implications.
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RCM is a process used to identify what Preventive Maintenance or Condition Based Maintenance you need to implement so you get the Reliability you need from your equipment.
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The following video desribes 2005 fire/explosion in Praxair’s gas cylinder filling and distribution center. The incident occurred when gas from a pressurized propylene cylinder was released through the relif valve and got ignited.
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R. James Abernathy was a writer who specialized in flour and grain mills in the late 1800s. In 1880, he authored Practical Hints on Mill Building. Early in this 350-page technical manual, he wrote that millwright skill was declining. He thought the reason was that the millwrights were assembling mills from pre-fabricated components, instead of having to manufacture parts by hand. The manual was published in the United States and England, and remained an authority for several decades. It remains a reference for assessing mills for their historic value, such as applications for national historic registers.
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The way we communicate information has undergone a significant transformation. Traditional writing has given way to a more concise and engaging writing style on social media. This brief article provides six ways that social media has improved my business writing.
I use subheadings selectively in traditional writing. Selectively means maybe one subheading per 3 to 5 paragraphs. Social media teaches us that subheadings serve as signposts, guiding readers to the information they seek, improving readability, and enhancing the overall user experience. I know to use a subheading for every 1 to 2 paragraphs.
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In project management we can’t always be in control of the environment around us. We can only forecast rather than predict risk and despite our ‘reasonable’ or even ‘best’ efforts to mitigate risk; shit happens and emergencies ensue! It’s not just physical emergencies but also those related to time and cost; remember overbudget or late projects can create an emergency for shareholders and stakeholders alike.
Maybe it’s because we tend to look at the ‘big risks’ or the ‘top ten’ after some semiquantitative assessment but then fail to consider that risks can change with time as more information becomes available. Or, maybe it is because only those risks that can be clearly defined and are ‘likely’ are communicated to the eyes and ears on the ground. Those low probability, high impact risks can tend to slip under any risk radar.
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To not have a problem you must prevent its creation. Once a problem exists you can never stop it repeating until all its roots are eliminated. Doing Root Cause Analysis (RCA) on a problem to try and prevent it has a miniscule chance of working because you can never find all the roots of its cause. The roots you do not eliminate will let the problem grow again.
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Fred wrote, “I would like to suggest that you continue writing articles – make them more tutorial in nature as if teaching someone the stats from scratch that you use in your articles. Instead of loads of references to papers and procedures, explain the concepts and math involved.” OK, I’ll try.
Nonparametric field reliability estimators require no unwarranted distribution assumptions and they preserve all information in data. Here’s how to compute them, without life data, while preserving all relevant information in ships and returns counts.
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One of the most valuable tools for a Reliability Engineering team is an asset life model repository or Library. This is also known as the Weibull Library. It contains the life models for all the critical assets in the organization. This information is crucial for failure prediction and ultimately decision making in the domain of asset management. It is the company’s own and true version of a “failure database”. It avoids the use other generic external databases that might not reflect the true behavior of the assets in the organization.
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THE BUSINESS RISK EQUATION SHOWS YOU HOW MUCH YOU WILL LOSE FROM ANY FAILURE EVENT
THE COMPLETE BUSINESS RISK EQUATION EXPLAINS WHAT INFLUENCES YOUR CHANCE OF SUCCESS IN BUSINESS
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Risk = Consequence x Opportunity x Uncertainty of the Opportunity
One of the most important business equations of them all is the full form of the business risk equation shown above.
The majority of companies today outsource a major portion (up to 60-70%) of their work scope to subcontractors. As a result, the subcontractors become a risk to your project because you have no direct control over them. For example, if they start to slip their schedule you cannot direct them to put more assets on the job to pull the schedule back. The other risk that is not obvious is that posed by your subcontractors major vendors or subcontractors. To illustrate this point, this article describes a story that I was personally involved in.
