as design quality increases the designer disappears. He went on to suggest
that the formalism we when recognising a designer's work is as much an imperfection of the design as a feature.
I was not so sure. There are definitely instances where the designer's mark seems to contribute to the design. Programming languages are a good example. Ruby would not be what it is without the strength of Matz's personal vision.
On the other hand, I do get annoyed when a designer's vanity tempts them to graffiti their signature onto a design that would have been better left alone. I'm thinking here of 'clever' designs like teapots with two spouts.
The difference between these two scenarios is, in my opinion, is whether or not the design space is convergent. I mean the term in the same sense as convergent evolution. In a convergent design space, the differences between designs will gradually disappear over time as individual designers are gradually more successful at approximating the best solution to the problem at hand.
In such a domain, it follows that any deviation from the one true design is noise. The designer's personal touch therefore detracts from their attempt to produce good design. A double-spouted teapot might help the designer express their individuality, but the result is just slightly less convenient tea.
However, it's rare to find a design space where a Platonic 'best' design exists. When have the various stakeholders in the construction of a new building ever agreed what is best? And to revisit my earlier example, which language is 'best' is one of the most common topics of programming flame wars.
Designers usually have to balance competing interests. How much should the finished product cost? What kind of user/customer should it be optimised for? What about older users/customers, or ones with disabilities? And not least, when is the deadline for the completed design? How designers balance these interests will inevitably affect the design. There is rarely any objective way to balance these subjective interests, so there is rarely an objective best design.
In such open design spaces, the designer's vision serves an important purpose - coherence. There are so many elements in a complicated design that it can be hard to take them in all at once. A strong authorial vision helps users/customers by giving them a guide to predict and/or remember the designer's choices.
Many Ruby admirers speak of the
Principle of Least Surprise. Ruby is comparatively easy to learn and understand because its design choices aim to produce the least astonishment in the programmer. But since every programmer comes from a different background, they will each have different expectations and standards of astonishment.
So more precisely, Ruby was designed according to the Principle of Matz's Least Surprise. Once the programmer gets a handle on Matz's programming aesthetic, they can make educated guesses about parts of the language that they have not yet encountered.
So in conclusion,
the formalism we when recognising a designer's workis a feature because it makes understanding complicated design simpler.