crime
Traced in the summer skies
Yes, it was the hour when, a long time ago, I was perfectly content. What awaited me back then was always a night of easy, dreamless sleep. And yet something had changed, since it was back to my cell that I went to wait for the next day…as if familiar paths traced in summer skies could lead as easily to prison as to the sleep of the innocent.
Putting the streets to use
Tad Friend writes, if you build “nine hundred miles of sinuous highway and twenty-one thousand miles of tangled surface streets” in one city alone, then you’re going to find at least a few people who want to put those streets to use. This suggests that every city blooms with the kinds of crime most appropriate to its form.
Every heist is a counterdesign
Heists obsess people because of what they reveal about architecture’s peculiar power: the design of new ways of moving through the world. Every heist is thus just a counterdesign—a response to the original architect.
To commune with the space
...having realized long ago that the best way to commune with an architectural space was by breaking into it.
Bandits
A FilmA Burglar's Guide to the City
A Book by Geoff ManaughAuthorisation vs. Consent
An Article by Terence EdenI recently read this interesting, and distressing, story of a man who was drugged and robbed. A form of crime which has been going on for centuries. But the 21st Century twist is that the thieves forced him to transfer large sums of money via his phone's banking apps.
While under the influence, the victim used his usernames, passwords, PINs, and biometrics to send money to the criminal's accounts.
Is there a "technological" way to stop this? His banks initially refused to refund the stolen money. Only once the press stepped in did they relent. One bank, Revolut, said:
This was an unusual case where the payments were authorised by the customer but, as is now clear, without his consent.
Picking locks with audio technology
An ArticleThe series of audible, metallic clicks made as a key penetrates a lock can now be deciphered by signal processing software to reveal the precise shape of the sequence of ridges on the key's shaft. Knowing this, a working copy of it can then be 3D printed.
What's Wrong With This Model?
What's wrong with the rational model
- We Don’t Really Know the Goal When We Start
- We Usually Don’t Know the Decision Tree – We Discover It as We Go
- The Nodes Are Really Not Design Decisions, but Tentative Complete Designs
- The Goodness Function Cannot be Evaluated Incrementally
- The Desiderata and Their Weightings Keep Changing
- The Constraints Keep Changing
Deciding what to design
We Don’t Really Know the Goal When We Start
The most serious model shortcoming is that the designer often has a vague, incompletely specified goal, or primary objective. In such cases, the hardest part of design is deciding what to design.
I came to realize that the most useful service I was performing for my client was helping him decide what he really wanted.
Today, we recognize that rapid prototyping is an essential tool for formulating precise requirements. Not only is the design process iterative; the design-goal-setting process is itself iterative. Knowing complete product requirements up front is a quite rare exception, not the norm. Therefore, goal iteration must be considered an inherent part of the design process.
Evaluating goodness
The Goodness Function Cannot be Evaluated Incrementally
The Rational Model assumes that design involves a search of the decision tree, and that at every node, one can evaluate the goodness function of several downward branches. In fact, one cannot in general do this without exploring all the downward branches to all their leaves, which is possible in principle, but leads to a combinatorial explosion of alternatives in practice.
Changing constraints
The Constraints Keep Changing
The explicit listing of known constraints in the design program helps here. The designer can periodically scan the list, asking, “Can this constraint now be removed because the world has changed? Can it be entirely circumvented by working outside the design space?”
They just don't work that way
Perhaps the most devastating critique of the Rational Model, although perhaps the hardest to prove, is that most experienced designers just don’t work that way.
“Conventional wisdom about problem-solving seems often to be contradicted by the behavior of expert designers. Empirical studies of design activity have frequently found ‘intuitive’ features of design ability to be the most effective and relevant to the intrinsic nature of design. Some aspects of design theory, however, have tried to develop counter-intuitive models and prescriptions for design behavior.” — Nigel Cross
We must outgrow it
Why all this fuss about the process model? Does the model we and others use to think about our design process really affect our designing itself? I believe it does. I believe our inadequate model and following it slavishly lead to fat, cumbersome, over-features products and also to schedule, budget, and performance disasters.
The Rational Model, in any of its forms, leads us to demand up-front statements of design requirements. It leads us to believe that such can be formulated. It leads us to make contracts with one another on the basis of enshrined ignorance. A more realistic process model would make design work more efficient, obviating many arguments with clients and much rework.
The Waterfall Model is wrong and harmful; we must outgrow it.