Damon Armstrong

Caffeine Induced Tirades about .NET and Life
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In Loo of Technology

Published Monday, July 03, 2006 1:37 PM

I can imagine how the conversation must have gone.  A slick salesman stood in the board room staring down a room full of business savy executives.  "Just image how much money you will save," said the salesman, producing a break even analysis and complex charts backing up the claims of his product.  Everything looked good on paper.  All of the numbers made sense.  And aside from being a great economical decision, the technology they were about to buy into would also help save the environment!  What choice did they have but to buy in and send their money straight to the crapper?

Yes, restroom technology.  The loo.  It's becoming a more interesting journey each time nature calls because you never know what you're going to find next.  But is it really worth it?  I was recently out at a client-site where they spent who knows how much money outfitting their restrooms with the most up-to-date technologies a restroom has ever seen. Theoretically, the concept is great.  Embedded in all of you're favorite restroom fixtures are infrared sensors that determine how close you are to the item in question and whether you are coming or going.  When you walk away from a toilet, it auto-flushes.  When you put your hand near the soap dispenser, it auto-dispenses.  And the faucets only run when you're hands are in the sink.  At least in theory.

Reality, however, is another story.  Take the toilets and urinals for example.  Although they are great at determine when you're leaving, they are not so great at determining when you're not leaving.  Make one wrong move during your transaction and you'll set it off.  And if it catches you off guard and makes you jump, well, you'll probably set it off again.

Soap dispensers and faucets can also be problematic.  They're fun at first because you wave your hand under the soap dispensers and they fire a little squirt of soap on your hands.  Then you move your hands under the faucet and a torrent of water comes shooting out.  But while you're hand is under the faucet it’s only about 4 inches from the soap dispenser, so the dispenser continues to squirt soap because it's still sensing your hand.  When it's all said and done, you end up with clean hands and a gooey pile of soap in the sink. 

But sometimes it works out because you'll walk away and the faucet sensor gets stuck and the water never turns off (which in turns helps rinse away the soap).  You wave your hand back and forth under the sink hoping that you'll be able to turn the water off, but you only succeed in setting off the soap dispenser again.  You look for a way to turn off the water, but there are no knobs or buttons because it's a hands free system, so you're pretty much helpless. 

And as you away down the hallway and hear the fading sound of running water coming from the loo, remember, that's the sound of progress.

by Damon
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Comments

 

Flibble said:

Hehe... I've often struggled with these things myself, and whilst I think the intention and even some of the technology is pretty sound, it all breaks down at the affordance level.  By affordance, I don't mean the cost implication of the word, but the usability aspect instead.

So take the tap/faucet for example.  Essentially these sytems break down because the user is never knowingly fully in control.  In an effort to ensure the design is sleak and minimalist, the designer has sited the controls well out of sight of the user, forcing vague wafts of your hand to instigate your desired liquid.  Then of course, there's a terrible delay between waft and liquid, by which time you're either still frantically waving your hands about hoping to find the trigger point, or it's fired and missed your hand.

When faced with a device that (bar a few crazy exceptions) has worked flawlesly and simply for generations, most users are put slightly out of their comfort zone.  If the designers really want these new systems to be successful, they'll need to heed a few basic usability idioms, i.e. don't hide controls and give immediate feedback.  

I suspect there aren't many usabilty peeps working in the plumbing industry or we wouldn't have ever seen those stupid taps that only give water when you press the top of them.  Truly awful.
July 4, 2006 2:44 AM
 

Damon said:

And my hope is that the next time a plumber shows up at my door he's not dragging a user-interface expert behind him.
July 7, 2006 5:14 PM
 

mhuk said:

"those stupid taps that only give water when you press the top of them"- but they can't be left running and waste water which is probably a good idea in a public area?
July 24, 2006 8:05 AM
 

Damon said:

I agree, the taps with the buttons on the top definately save water and avoid pranksters leaving a bunch of sinks overflowing.  But for the non-deviant user you normally get your hands about clean when the thing shuts off, and then you have to contaminate your hand by hitting the button again.
July 25, 2006 10:09 AM
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