Tag Archives: design

Unexpected bad news for turkeys

http://www.penguin.co.uk/books/the-black-swan/9780141034591/Risk is defined as the probability of something happening multiplied by consequences of its occurrence.  Engineers expend considerable time and effort in reducing the consequences of the quite probable such as ensuring the passenger compartment of a car will remain largely intact during a crash.  The installation of automatic breaking systems on some cars is also an attempt to reduce the probability of an impact, i.e. the occurrence of a crash.  It is difficult to anticipate the very low probability event with catastrophic consequences and so cars are not designed to deal with meteors dropping out the sky or even elevated highways collapsing in an earthquake.   These are what Nassim Taleb, labels Black Swan events but would perhaps be better named after another bird, the more humble turkey.  An American turkey is fed daily by a friendly human and has no idea in November that Thanksgiving is about happen with fatal consequences, or substitute December and Christmas for a British turkey.  From the turkey’s perspective everything is fine down on the farm until it isn’t; in other words, the very low probability event with catastrophic consequences occurs.  From the farmer’s perspective, turkey for dinner at Thanksgiving is close to a certainty, i.e. a probability of one.  The problem for engineers designing machines is to have the perspective of the farmer and not the turkey.

Happy Thanksgiving to my American readers!

Source:

Nassim Nicholas Taleb, The Black Swan – the impact of the highly probable, London: Penguin Books, 2008.

Greed overwhelms ethics

My car but not my house!

My car but not my house!

The scandal about Volkswagen emissions has already caused journalists and others to wring their hands or to preach sermons, or both, about the ethical standards of the engineering profession, see for example the Editor’s blog in Professional Engineer where he reminds us that professional engineers should conduct their professional work and relationships with “integrity and objectivity and with due regard for the welfare of the people, the organisations and the environment with which they interact”. The quotation is from the Royal Charter of the Institution of Mechanical Engineers. Fine words written to induce good intentions that rarely survive in the face of greed or simply the need to keep your job so that you can feed and house your family.

In my view, the emissions scandal seems to have parallels with the banking scandals of the past decade, in which corporate greed has trampled over ethics and morals in the pursuit of ever larger profits while government regulators through incompetence or acquiescence have allowed it to continue. Volkswagen were wrong to design a device to cheat the Government emission tests, but Government regulators were naive to design a test in which it was so easy to cheat. Senior executives at Volkswagen have blamed their employees following other recent examples.  These company leaders were paid gigantic salaries to provide both leadership and management and, in my opinion, they have failed in both by blaming the people they are supposed to be leading and by allowing the scandals to happen in the first place.

The evidence would suggest that we can trust neither corporations nor governments to take care of the environment. One solution is for all vehicles to provide real-time information on the dashboard about NOX and Carbon emissions as well fuel consumption then we can make our own choices. When I moved to the US more than a decade ago, I was surprised to find that fuel consumption data was not available on the dashboard of most cars as it was already commonplace in Europe. Perhaps its presence was a factor in the development of fuel efficient cars in Europe although clearly higher fuel prices play a large role.  However, in the absence of a tax on emissions, real-time emission data on the dashboard would motivate engineering ingenuity to compete to produce lower emission designs instead of wasting creativity on cheating in useless Government tests.

Here are some of facts to support my statements above about large profits and gigantic salaries:

Volkswagen profits rose 21% in 2014 to more than $12billion on an annual turnover of $230 billion which is comparable to the GDP of Portugal.

The CEO of Volkswagen was paid almost $18million per year which is about 250 times the average salary of a Volkswagen engineer.

Sources:

Hibbert, L., Editor’s comment: October 2015 The Volkswagen emissions testing scandal has put the issue of professional ethics in the spotlight, Professional Engineer, October 07, 2015.

Wall Street Journal, Feb 27th, 2015

Volkswagen AG Annual Report 2014

World Bank Data Bank

Reuters, March 12th, 2012

glassdoor.com

 

Hype cycle

gartner_hype_cycle_2005It is easy to become cynical about the latest innovation and the claims for its future success.  The tendency becomes worse with age and the feeling that you’ve seen it all before.  The IT consultancy firm, Gartner Inc. have invented a graph to describe the cycle of enthusiam, despondency and maybe ultimate productivity of new inventions.  They call it the hype curve.  For most new ideas the plateau of productivity is 5 to 10 years after the peak of inflated expectations and separated from it by a deep trough of disillusionment.

Gartner Inc publish an annual analysis of the status of new technology in the form of a single hype curve.  It’s interesting to see what’s in the trough [cloud computing, mobile health monitoring] and what’s on or near the peak of inflated expectations [consumable 3D printing and autonomous vehicles] today.  You might have noticed from your smart phone that speech recognition has just reached the plateau of productivity.  The thumb-nail shows a historic hype curve for ten years ago.

Skilled in ingenuity

traininstationIf you look up the word engineering in the dictionary then the first few definitions will probably refer to engines, structures and such like, but the third or fourth definition might describe it as ‘the action of working artfully to bring something about‘.  The origins of the word ‘engineering’ lie in the Latin word ‘ingeniare’, which means to contrive or devise.  Unfortunately, engines have been a phenomenal success and are now synonymous with our profession.  I say unfortunately, because it hides from the general public that we do far more that contrive and devise engines as sources of power.  The vast majority of engineers have nothing to do with engines and instead work artfully to bring about all of the other things in our man-made world.

The Roman poet, Lucretius in his poem De Rerum Natura (On the nature of things) wrote ‘Nothing in the body is made in order that we may use it. What happens to exist is the cause of its use’.  In other words things did not evolve in nature to meet a demand but instead uses were found for what evolved.  Engineering is the reverse of this: its use is the cause of the existence of everything.  Well, perhaps not quite because people find uses for devices which were not thought of by even the most artful designer.

Sources:

http://www.oxforddictionaries.com/definition/english/engineering