The Murphy Way
January 18, 2011 Leave a comment
Our life is a perfect manifestation of Murphy’s laws, specifically the one, “if something has to go wrong, it will at the worst possible time”. Our attitude has long been to see, understand or analyze Murphy on the pessimistic. We often miss out on the actual viewpoint. I was googling through Murphy’s laws and later sort of explored through Sod’s, Finagle’s and all the other possible variations of them.
Let me quote some of the variations first
1) The perversity of the Universe tends towards a maximum
2) Bad fortune will be tailored to an individual
These set of laws have got more to do with the human perception of fate, irony and the injustice of the universe. Consider another variant – “Good fortune will occur in spite of individual’s actions”. If you look at it, this one is exemplified by the idea that, “it won’t rain if you take your umbrella”. In regular usage we call this unsympathetic magic.
I remember reading somewhere that there are actually two ways of looking at these laws. One of them is the pervasive universe way otherwise known as the jelly side down viewpoint. This viewpoint is famous for the fact that it aligns pretty much in equity with our natural tendency to behave. It’s actually the more popular version, because we (humans) like to complain. There is also another viewpoint, that has got more to do with physics, which sort of concludes, “Mother Nature is a Bitch”.
But if we look at these laws and understand them properly, there is hidden engineering in here. They kinda talk about Failsafe design. How do you counter software flaws? Go by exploring all Murphy permutations and try to counter them. All though Murphy’s alleged usage might have been completely different in outlook and attitude from this, it sort of boils down to this. It’s highest expression is in the idea of Fail Safe, a design whose failure modes are all innocuous, rather than a design with failure modes that, nonetheless can have disastrous repercussions. Remember how nuclear reactors were developed in the 50s and 60s? Safety was for the most part actively maintained, meaning a failure of safety mechanism could lead to a disaster.
If you look at it, the likelihood of a catastrophic accident seems highly unlikely. However, there is no statistical independence of adverse events. Human errors do tend to come in clusters. Simply put, things tend to break more often when they are either new (due to manufacturing defects) or when they are nearing the end of their designed life. In other words, new things have a greater likelihood of multiple component failure, as do devices near the end of their own design life. This is because designers try not to put very long-lived components with those of much shorter lives, sturdier components being more expensive. Thus, multiple component failure is more likely near the end of device design limits, aka “The Wonderful One Hoss Shay” effect.
Thus the design issues in a system could be attributed to Murphy way of thinking. When they are new they break when we least expect them to be because we haven’t put in enough effort in design and we never know when they’re nearing the end, so you wouldn’t really expect them to break, whilst they do. It’s more of a timing problem. It’s gotta do with Human perception and our overly optimistic or pessimistic mindsets. Murphy’s laws are not just random ones. They mean a lot more to Engineering design than what has been written here. Period.


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