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" Successful engineering is all about understanding how things break or fail. "
Henry Petroski
Successful
Understanding
Engineering
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" I'm a firm believer that no matter how small an object is, you can find interesting things out about it and its history. "
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" Engineering is achieving function while avoiding failure. "
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" Typically, highway bridges have about 50 years. But over in England, they have iron bridges approaching 250 years. In France, there are Roman aqueducts that are approaching 2,000 years old. So a bridge can last a very long time if it's built properly in the first place and then maintained properly. "
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" No design, no matter how common or seemingly insignificant, is without its adamant critics as well as its ardent admirers. "
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" Everything we do is designed, whether we're producing a magazine, a website, or a bridge. Design is really the creative invention that designs everything. "
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" Relying on nothing but scientific knowledge to produce an engineering solution is to invite frustration at best and failure at worst. "
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" Successful design is not the achievement of perfection but the minimization and accommodation of imperfection. "
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" I relax by looking at things and reading about things. Even the simplest thing can reveal a great deal about the world around us. It relaxes me greatly to sit back with my feet up and look around my study at the everyday things that surround me. "
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" Science is about knowing; engineering is about doing. "
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" There's so much written about the Titanic, and it's hard to separate what's fact and what's fiction. My understanding is that the way the Titanic was designed, the emphasis was placed on surviving a head-on collision. "
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" The definition of 'safe' is not strictly an engineering term; it's a societal term. Does it mean absolutely no loss of life? Does it mean absolutely no contamination with radiation? What exactly does 'safe' mean? "
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" An over-reliance on past successes is a sure blueprint for future failures. "
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" It is really want, rather than need, that drives the process of technological evolution. "
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" The space shuttle was designed, at least in part, to broaden our knowledge of the universe. To scientists, the vehicle was a tool; to engineers, it was their creation. "
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" For as long as I can remember, I have been fascinated by things large and small. I wanted to know what made my watch tick, my radio play, and my house stand. I wanted to know who invented the bottle cap and who designed the bridge. I guess from early on I wanted to be an engineer. "
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" All conventional wisdom has an element of truth to it, but good design requires more than an element of truth - it requires an ensemble of correct assumptions and valid calculations. "
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" My first book, 'To Engineer Is Human,' was prompted by nonengineer friends asking me why so many technological accidents and failures were occurring. If engineers knew what they were doing, why did bridges and buildings fall down? It was a question that I had often asked myself, and I had no easy answer. "
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" I emphasize that virtually every engineering calculation is ultimately a failure calculation, because without a failure criterion against which to measure the calculated result, it is a meaningless number. "
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" Because they are so humbled by their creations, engineers are naturally conservative in their expectations of technology. They know that the perfect system is the stuff of science fiction, not of engineering fact, and so everything must be treated with respect. "
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" Failure is central to engineering. Every single calculation that an engineer makes is a failure calculation. Successful engineering is all about understanding how things break or fail. "
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" Case studies of failure should be made a part of the vocabulary of every engineer so that he or she can recall or recite them when something in a new design or design process is suggestive of what went wrong in the case study. "
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" As long as there are things to wonder about, there are stories to be written about them. That makes me happy, because writing about things seems to be my thing. "
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" I have always been fascinated by the way things work and how they came to take the form that they did. Writing about these things satisfies my curiosity about the made world while at the same time giving me an opportunity to design a new explanation for the processes that shape it. "
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" Too much redesign has to do more with fad and fashion than with fitness and function. It is change for the sake of change. Such redesign is not only unnecessary, it is all too often also retrogressive, leading to things that work less effectively than those they were designed to replace. "
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