Data-driven design is "hill-climbing," a well-known algorithm for optimization. Imagine standing in the dark in an unknown, hilly terrain. How do you get to the top of the hill when you can't see? Test the immediate surroundings to determine which direction goes up the most steeply and take a step that way. Repeat until every direction leads to a lower level.
But what if the terrain has many hills? How would you know whether you are on the highest? Answer: you can't know. This is called the "local maximum" problem: you can't tell if you are on highest hill (a global maximum) or just at the top of a small one.
When a computer does hill climbing on a mathematical space, it tries to avoid the problem of local maxima by initiating climbs from numerous, different parts of the space being explored, selecting the highest of the separate attempts. This doesn't guarantee the very highest peak, but it can avoid being stuck on a low-ranking one. This strategy is seldom available to a designer: it is difficult enough to come up with a single starting point, let alone multiple, different ones. So, refinement through testing in the world of design is usually only capable of reaching the local maximum. Is there a far better solution (that is, is there a different hill which yields far superior results)? Testing will never tell us.
Here is where creative people come in. Breakthroughs occur when a person restructures the problem, thereby recognizing that one is exploring the wrong space. This is the creative side of design and invention. Incremental enhancements will not get us there.
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We found that using landmarks in directions helps for two simple reasons: they are easier to see than street signs and they are easier to remember than street names. Spotting a pink building on a corner or remembering to turn after a gas station is much easier than trying to recall an unfamiliar street name. Sometimes there are simply too many signs to look at, and the street sign drowns in the visual noise. A good landmark always stands out.We also discovered that there are three situations in which people resort to landmarks. The first is when people need to orient themselves — for instance, they just exited a subway station and are not sure which way to go. Google Maps would say: "Head southeast for 0.2 miles." A person would say: "Start walking away from the McDonald's." The second situation is when people use a landmark to describe a turn: "Turn right after the Starbucks." The third use, however, is the most interesting. We discovered that often people simply want to confirm that they are still on the right track and haven't missed their turn.
Inukshuk vary in shape and size, with deep roots in the Inuit culture. The word inuksuk means "something which acts for or performs the function of a person." The inuksuk may have been used for navigation, as a point of reference, a marker for hunting grounds, or as a food cache. Historically the most common type of inuksuit is a single stone positioned in an upright manner.
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LinkedIn rolled out a new interface today designed to improve screen real estate and navigation. I wasn't aware of the redesign until I went out there this morning but immediately noticed the changes. While it's not stunningly beautiful, it's still very functional and that wins all the important awards in my book. That said, one area that still bugs me on LinkedIn is the Advanced Search.
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I came across a rare blog post yesterday evening. It's rare because it stitches together data from a couple of places to help solve a conundrum. In this case, it also illustrated some fantastic vignettes on usability testing, data-driven strategy and innovation. What was the conundrum? Yesterday, Google launched its DNS service but it hasn't been exactly clear why. Google's official response effectively states that "It's good if the Internet is fast because people can be more productive." Sounds altruistic, just like another recent comment from Google about not stealing all of the talent in the world, but Jason Kottke (@kottke) has a different thought on why Google would be interested in accelerating page load speed.
From his post:
Google VP Marissa Mayer told the audience at the Web 2.0 conference that slowing a user's search experience down even a fraction of a second results in fewer searches and less customer satisfaction. Marissa ran an experiment where Google increased the number of search results to thirty. Traffic and revenue from Google searchers in the experimental group dropped by 20%. Ouch. Why? Why, when users had asked for this, did they seem to hate it? After a bit of looking, Marissa explained that they found an uncontrolled variable. The page with 10 results took .4 seconds to generate. The page with 30 results took .9 seconds. Half a second delay caused a 20% drop in traffic. Half a second delay killed user satisfaction.
Some lessons here:
There's a lot to like in such a short post. Full text can be found here.
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