Short version: It frequently helps for people to bounce ideas off each other, but forbidding disagreement isn't useful. (The article doesn't discuss possible ill-effects of too much hierarchy.)
At least for musicals, the best results seem to come from groups which include both people who've worked with each other before and newbies.
Huge gains can be gotten from random contacts-- it's good to be in a building where people from different specialties come in frequent contact with each other.
The book this post is based on (Serious Creativity) is also pretty critical of traditional brainstorming and "withholding judgment." I chose the word "brainstorming" in the title because it's catchier and more connotative than something like "idea generation." Here's an excerpt:
...The traditional process of brainstorming sometimes gives the impression that deliberate creativity consists of shooting out a stream of crazy ideas in the hope that one of them might hit a useful target...a scatter-gun approach to creativity makes no
- Harry Potter and the Methods of Rationality
- Edward De Bono, Serious Creativity
I will summarize some of the techniques for how to generate ideas presented in Serious Creativity. The book also has other material, e.g. interesting deep theories about why these techniques work, arguments for the importance of creativity, and more techniques beyond what's described in this post, but in the interest of keeping this post concise and useful, I will only describe one kind of technique and urge you to just try it. You should read the book if you want more detail or techniques.
These techniques can be used both when you have a problem you need to solve and when you have a general area that you suspect could be improved or innovated, but don't have any specific ideas of what's wrong (or even if you don't feel like there's anything wrong at all).
The technique I will describe in this post is that of "provocation" followed by "movement." A provocation is a seemingly random or nonsensical sentence or phrase. Movement is the process of going forward with a provocation and actually generating an idea. There are precise, formal techniques for generating provocations and movement, which I will describe after giving an example of how this "provocation-movement" process works.
Example
Provocation: Planes land upside down.
Movement: We can imagine this actually happening, and observe that the pilot would have a better view of the landing area. This naturally leads us to consider other ways to improve the pilot's view of the landing area. Perhaps we could move the cockpit to the bottom, or add video cameras. So using this technique, we've identified an area for improvement and two possible ways to make that improvement.
Setting Up Provocations
Provocation is a way to avoid getting stuck in the same "mental pathways" (see priming) so that you can find new ones. Provocations should not make sense and are not necessarily intended to convey meaning; they are just intended to "make things happen in our minds." The book precedes provocations with "po," a word used to indicate that the sentence is intended to be nonsensical and illogical. Po stands for "provoking operation." The book describes several techniques for generating provocations.
A provocation doesn't need to follow from one of these techniques. A provocation can be any incorrect or absurd statement. These techniques are just easy step-by-step ways to generate provocations without requiring any elusive "spark of inspiration." Once a provocation is generated, it should be followed by one or more of the movement techniques described in the next section.
If you are trying to solve a specific problem or innovate in a particular domain, then choose provocations related to the domain. That is, if you're trying to figure out how to improve wikipedia, don't use a provocation like "Po, the orange juice has me for breakfast," choose one like "Po, citations are not needed" (escape) or "Po, articles contain encyclopedias." (reversal).
Movement
Movement allows you to take some idea, concept, or provocation and move forward with it to generate more useful ideas and concepts. These techniques don't apply solely to provocations: you can use them for ideas and concepts too. The book describes 5 formal techniques for movement:
You can use these movement techniques not just on provocations, but also ideas or concepts. For example, you may start with a provocation, use the "moment to moment" technique which gives you an idea, and then you could use the "positive aspects" technique with that idea to generate more ideas. Also, of course, you do not need to strictly use just these techniques. If a provocation directly leads you to think of something interesting without explicitly choosing to use one of these techniques, that's fine, you should explore the idea more. Use these when you need them.
More Examples
Here's another example from the book. This one uses the "moment to moment" movement technique:
And here's another one from the book. The provocation uses the "escape" method and the movement seems to use the "circumstances" method:
Warnings