BLUE SKY REDEMPTION
Some time ago, when I was applying for my first job, an interviewer asked me the following question: "Completely blue sky, that is ignoring any monetary or technical constraints, describe for me the perfect shower controls." Up until then, things had been going very well. It took me a long time to realize exactly how badly I screwed up the answer to this question. The only way I could have made more certain that I did not get the job would have been to mention the interviewer's daughter in my answer.
The short version of what I did wrong? I forgot about the "blue sky" part of the question. You're not getting the long version, I don't want to talk about it. As someone who prides himself on creativity and intelligence, I'm still intensely embarrased at my incredible failure to use either of those traits to answer the question.
Since the day I realized what I had done, I have spent some time thinking about how to properly answer such a question. For lack of anything better to do today, I'm going to share some of these thoughts with you.
First, one must consider: what is the ultimate purpose of a shower? If you do not understand what people intend to get out of the experience, you will not be able to give them the means to get it. So, what DO people want from a shower?
Well, to get clean, for one. Well if that's the case (and I'm going to argue in a moment that it's not the
only case), and we take "without constraints" to mean "without constraints" why do we even need the shower, let alone the controls? Why not assume a device that is capable of cleaning a person in a much less intrusive and less time intensive manner? Assume, instead, we could build a device into a doorframe that automatically (and unobtrusively) removes dirt and oils from you
and your clothes every time you walk through it; or assume a piece of jewelry that acts to prevent you from ever getting dirty in the first place. Think of all the time such a device would save. Think about how inconvenient the shower-as-cleaning-device really is and get rid of it. In other words, if we're assuming our point is cleanliness and we have a blue sky to do it in, we're assuming a world that doesn't bother with showers.
But... if we take a closer look, cleaning ourselves isn't really the only use we have for showers. Humans, as I'm fond of pointing out, have never limited themselves to using a thing solely for its original purpose (some would argue that this tendency is exactly what makes us human). Some people instead use showers to warm up on a cold day, to cool off after a hard workout. Some people use them to wake up (slowly or suddenly). Some people simply enjoy the sensation of standing beneath a stream of water (with or without company). In other words, besides cleanliness, we also simply enjoy the
feel of a shower and will use one for that purpose alone.
A tiny device, in a blue sky world, might be capable of providing the same sensations without the extra room or, say, the skin drying effects, but even so, controls would be required.
Now that I've demonstrated that I really can think "blue sky," I'll get around to answering the actual question. Not that the previous discussion was useless, it serves to point us towards the purpose of showers (or the simulation thereof) in a "blue sky" world: sensation.
Actually, I'm not going to get around to that question quite yet. After we figure out WHY we're controlling a thing, we need to understand WHAT we can control about it. What dimensions exist within the context of the shower that we would wish to have under our control?
Your typical shower today gives you control over temperature and flow (although these are not usually independent). Some shower heads then give you further control over the
force of the water, the shape, and the output pattern (massaging or steady) - again, not usually independent. The shower-head-on-a-hose attachment, although not often considered a control does act as onel; it is a means of controlling the direction of water flow. What else is there we could control about the shower? How about the size of the droplets? If we really have complete control, we could provide a full range from atomized mist to a solid stream (my personal favorite).
Here, then, is a quick list of the various factors we might possibly wish to control if it was in our power to do so (and keeping in mind that sensation is our goal): water temperature, water volume, water pressure, pressure pattern over time, droplet size, direction, coverage, air temperature (yes, air temperature - ever stepped from a warm shower into a cold bathroom? Then you know why you might want to integrate air temperature into shower controls). I'm sure there are others.
That's a lot for one person to worry about. In a pure "blue sky" world, however, the user shouldn't have to worry at all. The shower would be able to read the user's neurological activity and manipulate the environment from there. Step into the shower, think to yourself "today I feel like a warm, misty kind of shower" and it will take care of itself. Too warm? The shower will adjust based on your preferred comfort level (keeping in mind that some people
prefer showers to be just short of painful). There would need to be some indication for first time users that this is how the shower operates or they will spend a long time looking for a knob before they step in. Although such a notification would become less and less necessary as such a shower gained wider adoptance.
On top of the mind reading, designers would probably also want to install an emergency cutoff just in case something malfunctioned (assuming everything will always work as planned is a quick and easy way to get into serious trouble - even in a blue sky world). Such a cutoff would have to be easy to find with your eyes closed, reachable from a prone position (in case of a fall), and not blocked by the source of water.
Now if mind reading is a little too-blue-bordering-on-the-black-of-space, there are other options. Voice control would be my next choice (assuming, of course, that this blue sky world has technology that can handle conversational style voice commands in such an accoustically hostile environment), namely because it's incredibly versatile, and fits all the requirements listed above for the emergency cut off: accessible with water in your eyes, accessible in case of accident, and not blocked by the source of water (to be safe, you'd probably still want a physical cut off option). The only thing it does not do, that mind reading would not require, is remind the user what adjustments are actually possible. If it never occurs to the user that they can adjust the droplet size, they will never make an attempt to do so. One way to address that concern would be a list of features that displays when you first perpare for the shower (and which can be told not to after you've owned the shower long enough) and could be redisplayed (or spoken out loud) during the shower at the user's request.
There are plenty of other considerations such as individual defaults ("Hey shower, it's Bob, I think I'd like my 'Workout Cooldown' preset this time.") and additional non-shower-specific features ("Turn the radio on to DC 101, and remind me I've been in here too long after about ten minutes."). Physical controls, or even reduced functionality voice controls (that is, predefined instead of conversational), would be a whole new issue but this post is already long enough. I think you get the picture.
Next time I get a blue sky question, I'll do better (it would be hard not to).