Architects are perhaps more fond than other people of the picture-tells-a-thousand-words principle, and some of them link this principle with what they call "right-brain" thinking, whatever that means. So surely we must be entitled to have high expectations of the power and clarity of diagrams in an architect's slide presentation?
Sadly, the visual language of architectural discourse, from enterprise to software, is surprisingly weak. Many diagrams look as if they may have started as meaningful sentences, but they have been transformed into diagrams by discarding most of the words and putting the remaining words into coloured shapes, arranged artistically on the page. This might give the audience something to stare at while the presenter is talking, but it's often difficult to see what such a diagram communicates over and above the words. There are some arrangements that I find particularly puzzling, and therefore distracting, because they hint vaguely at some logical or structural significance, and I am left wondering what exactly this diagram is trying to tell me.
The Venn DiagramA popular graphic involves three words written in overlapping circles - for example "people", "process", "technology". Most people are familiar with the use of the Venn diagram in elementary set theory - this is nowadays taught in primary school. But in Powerpoint-ese, this graphic seems to mean either "here are three disparate things that might have to be considered together" or "here are three topics I'm going to talk about separately" and it's probably not worth trying to interpret the semantics of the diagram in terms of set theory.
If we compare a faux Venn diagram containing the words "people", "process", "technology" with a slide containing the same three words as bullet points, it is difficult to see how any additional meaning is conveyed by the diagram.
as if People Mattered
In order to show that architecture involves people, diagrams are decorated with little pictures of people that look as if they have been cut out of a magazine. Or even worse, the same set of cartoons we've seen hundreds of times before. The inclusion of these pictures seems to be little more than a token gesture to human-centred architecture, in the same way that corporate brochures often contain pictures of models (male and female) pretending to be office workers.
There is of course nothing wrong with including pictures of people in your presentation, but it becomes a cliché if the pictures are arbitrary or inauthentic, picked at random from a collection of clipart or stock photos. I've even seen presentations that were trying to tell a story involving different roles, where a small number of stock pictures were reused inconsistently from one slide to the next. (In one slide there's a picture of a black woman representing the programmer, in the next slide the same black woman represents the project manager, and by the end of the presentation she's been promoted to CEO. Is this intended to give me a rosy impression of the company's diversity policies, or is it just careless presentation design?)
This is not just an issue for enterprise architects - the people who design buildings suffer from the same tendency. See my post What if architects designed our communities?
I have myself become somewhat disillusioned with the picture-tells-a-thousand-words principle. I have sat through many presentations, as well as presenting material developed by other people, and been frequently frustrated by poor visual language. And I have myself produced many presentations containing many diagrams; I freely admit that some of these diagrams have been more successful than others, and I haven't always managed to avoid visual cliché. But at least I'm trying.
Update: In the new production of Don Giovanni at the ENO, Leporello uses a slide presentation to narrate his master's conquests [Classical Source]. But who would want to emulate Leporello?