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Brainstorming is a group creativity technique designed to generate a large number of ideas for the solution of a problem. The method was first popularized in the late 1930s by Alex Faickney Osborn in a book called Applied Imagination, in which he proposed that groups could double their creative output with brainstorming. The technique typically involves gathering a group of up to 10 people, including some invited guests from other fields, posing a question, and asking them to respond with as many answers as possible. Their responses are recorded, and later sorted and evaluated. The theory is that members of the group will be stimulated by each others’ ideas to come up with new suggestions. Of the multiple ideas, one or more will be a good solution for the problem.

Recent studies have show that because of such problems as distraction, social loafing, evaluation apprehension, and production blocking, brainstorming groups are little more effective than other types of groups, and they are actually less effective than individuals working independently. Numerous attempts have been made to improve brainstorming or use more effective variations of the basic technique. Modern methods such as the use of email to collect and distribute participants’ ideas, or computer applications that allow group members to log in and record their own contributions, may overcome these obstacles and increase the effectiveness of brainstorming. Although traditional brainstorming does not increase the productivity of groups, it provides other benefits, such as boosting morale, enhancing work enjoyment, and improving team work.

Ground Rules

There are four basic rules in brainstorming.[1] These are intended to reduce social inhibitions among groups members, stimulate idea generation, and increase overall creativity of the group.


Set the problem

Before a brainstorming session, it is critical to define the problem to be discussed. The problem must be clear, not too big, and captured in a specific question such as, "What service for mobile phones is not available now, but needed?" If the problem is too big, the facilitator should break it into smaller components, each with its own question. Some problems are multi-dimensional and non-quantified, for example, "What are the aspects involved in being a successful entrepreneur?" Finding solutions for this kind of problem can be done with morphological analysis (problem-solving).

Create a background memo

The background memo is the invitation and informational letter for the participants, containing the session name, problem, time, date, and place. The problem is described in the form of a question, and some example ideas are given. The ideas are solutions to the problem, and can be used when the session slows down or goes off-track. The memo is sent to the participants well in advance, so that they can think about the problem beforehand.

Select participants

The facilitator composes the brainstorming panel, consisting of the participants and an idea collector. A group of 10 or fewer members is generally more productive. Many variations are possible but the following composition is suggested.

Create a list of lead questions

During the brainstorm session the level of creativity may decrease. At this moment, the facilitator should stimulate creativity by suggesting a lead question to answer, such as Can we combine these ideas? or How about looking from another perspective? It is best to prepare a list of such leads before the session begins.

Session conduct

The facilitator leads the brainstorming session and ensures that ground rules are followed. The steps in a typical session are: Process of conducting a brainstorming session

The process


Brainstorming involves more than just the generation ideas for others to evaluate and select. Usually the group itself will, in its final stage, evaluate the ideas and select one as the solution to the problem proposed to the group. If the group itself is to carry out the solution:


Nominal group technique

Participants are asked to write their ideas anonymously. The moderator then collects the ideas and each is voted on by the group. The vote can be as simple as a show of hands in favor of a given idea. This process is called distillation.

Group passing technique

Team idea mapping method

The process begins with a well-defined topic. Each participant brainstorms individually, then all the ideas are merged onto one large visual idea map. During this consolidation phase, participants may discover a common understanding of the issues as they share the meanings behind their ideas. During this sharing, new ideas may arise by the association, and they are added to the map as well. Once all the ideas are captured, the group can prioritize and take action.

Electronic brainstorming

Electronic brainstorming is a computerized version of the manual brainstorming technique. It can be done via email and may be browser based, or use peer-to-peer software.

Other brainstorming techniques are web-based, and allow contributors to post their comments anonymously through the use of avatars. This technique also allows users to log on over an extended time period, typically one or two weeks, to allow participants some "soak time" before posting their ideas and feedback. This technique has been used particularly in the field of new product development, but can be applied in any number of areas where collecting and evaluating ideas would be useful. Extensive research conducted by Olivier Toubia of Columbia University indicates that the use of incentives is very effective within the context of brainstorming.[2]

Directed brainstorming

Directed brainstorming is a variation of electronic brainstorming (described above) that can be done manually or with computers. Directed brainstorming works when the solution space (the criteria for evaluating a good idea) is known prior to the session and can be used to intentionally constrain the ideation process.

In the laboratory, directed brainstorming has been found to almost triple the productivity of groups over electronic brainstorming.[3]

6-3-5 Brainwriting

“6-3-5 Brainwriting” (also known as the 6-3-5 Method, or Method 635) is a group creativity technique used in marketing, advertising, design, writing and product development originally developed by Professor Bernd Rohrbach in 1968.[4]

The aim of 6-3-5 Brainwriting is to generate 108 new ideas in half an hour. The technique involves 6 participants who sit in a group and are supervised by a moderator. Each participant thinks up 3 ideas every 5 minutes. Participants are encouraged to draw on others' ideas for inspiration, thus stimulating the creative process. After 6 rounds in 30 minutes the group has thought up a total of 108 ideas.

Individual brainstorming

"Individual Brainstorming" is the use of brainstorming on an individual basis. It typically includes such techniques as free writing, free speaking, word association, and the use of a "spider web," or “bubble maps” to organize ideas visually. Individual brainstorming is a useful method in creative writing and has been shown to be superior to traditional group brainstorming.[5]

Other variations

Defining the problem itself and identifying the best questions to ask can be the focus of a brainstorming session. This has been called questorming.[6] Another topic for brainstorming can be to find the best evaluation methods for a problem.

Effectiveness of brainstorming

Although brainstorming has become a popular group technique, researchers have not found evidence of its effectiveness for enhancing either quantity or quality of ideas generated. When placed in a group setting, colleagues or co-workers may be inhibited from speaking out by fear of criticism (evaluation apprehension), or because they believe that their ideas are not important or that others will make up for their lack of participation (social loafing). A brainstorming session is most effective if the participants are deeply motivated and believe that they have something important to contribute.

“Production blocking,” the tendency for one individual to block or inhibit other people during a group discussion, is a common problem in brainstorming groups. If six people are in a group and one person is talking at length about his or her idea, then the other five people are "blocked" and less able to provide their own creative input. They may not have time to think of an idea, or they may be distracted or forget about their idea before they have an opportunity to share it. Production blocking becomes more of a problem as the size of the group increases.

Studies have shown that brainstorming groups are little more effective than other types of groups, and they are actually less effective than individuals working independently.[7][8][9][10] Newer versions of brainstorming, in which individuals write down their ideas and submit them for other members of the group to review, or the use of email and computer applications that allow individuals to think creatively over longer periods of time, overcome barriers like production blocking and social inhibitions. These forms may be more effective in tapping the creativity of individual members of a group and arriving at substantial solutions. How well these newer methods work, and whether or not they should be classified as brainstorming, are subjects for further research.

Although traditional brainstorming does not increase the productivity of groups, it may provide other benefits, such as boosting morale, enhancing work enjoyment, and improving team work. Members of the group may become more creative when they are removed from their customary work environment. One of the most valuable benefits is exposure to the views of invited guests from outside the project, who may be able to provide new insights and perspectives from their professional or personal experience.




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