Facilitating Group Problem-Solving

The default way groups generate ideas — everyone in a room shouting suggestions — feels productive but is often surprisingly weak. Decades of research show that unstructured group brainstorming frequently produces fewer and worse ideas than the same people working separately. Good facilitation fixes this, and knowing how is a genuinely useful skill.

Why brainstorming disappoints

Classic brainstorming, as popularised by advertising executive Alex Osborn in the 1950s, told groups to generate ideas together without criticism. Research since has found a catch: groups often underperform the pooled output of individuals working alone. Two culprits are production blocking (only one person can talk at a time, so ideas are forgotten or suppressed while waiting) and evaluation apprehension (fear of looking foolish).

Generate alone, combine together

The fix is counter-intuitive: have people generate ideas independently first, then combine and build. This preserves the diversity and independence that make groups smart, before the group dynamics that suppress them kick in. Structured methods institutionalise this.

Structured techniques

Brainwriting has everyone write ideas silently, then pass and build on each other's — no one is blocked, and quiet members contribute equally. The nominal group technique has individuals generate ideas alone, then the group shares, discusses, and ranks them systematically. Both beat a free-for-all by protecting independent input.

A team needs ideas for cutting customer wait times. Instead of a shouting session, the facilitator has everyone silently write five ideas (five minutes), then each idea goes on a shared board anonymously, then the group clusters and builds on them, then votes. The quiet engineer's idea — which would have been lost in a verbal free-for-all — turns out to be the best. Structure surfaced it.

Structure can be over-applied into rigidity. Some problems benefit from lively, spontaneous discussion, and a facilitator who over-controls can kill energy and the productive collision of ideas. The goal is not to eliminate interaction but to sequence it: independent generation first, then rich collaborative building. Facilitation is judgment, not a rigid script.

Alex Osborn claimed in the 1950s that group brainstorming would roughly double creative output. Researchers put the claim to the test. In a series of studies — a well-known one by Michael Diehl and Wolfgang Stroebe in 1987 being frequently cited — scientists compared real interacting groups against "nominal groups" (the same number of people working alone, with their non-duplicate ideas pooled). Repeatedly, the individuals-working-alone condition produced more and often better ideas than the interacting group. The main culprit they identified was production blocking: in a group, people must wait their turn to speak, and while waiting they forget ideas or self-censor. The finding overturned a piece of popular management wisdom and pointed to the practical fix used by good facilitators today — let people think and generate independently first, then bring the group together to combine and refine. It is a clean example of testing a comfortable assumption against evidence.

• "Group brainstorming maximises ideas." Often the pooled output of individuals beats it.
• "The best ideas come out in lively discussion." Discussion helps build, but independent generation surfaces more.
• "Quiet members have less to contribute." Structured methods reveal they often contribute the best ideas.
• "Facilitation means controlling everything." It means sequencing independence and collaboration well.

In your next idea session, start with five minutes of silent individual writing before any discussion. Compare how many distinct ideas emerge versus a normal open discussion.

Think Like a Maester: Let people think alone before they think together — the group's job is to combine and sharpen, not to block.

1. Why does unstructured group brainstorming often underperform?
2. What is production blocking?
3. How do brainwriting and the nominal group technique help?
4. Why generate ideas independently before discussing?
5. What did the research (e.g., Diehl and Stroebe, 1987) find about brainstorming?

Unstructured group brainstorming, despite its popularity, often produces fewer and worse ideas than the same people working alone — mainly due to production blocking and evaluation apprehension, as research since the 1980s has shown. Good facilitation fixes this by having people generate ideas independently first (via brainwriting or the nominal group technique), then bringing the group together to combine and refine. The team advantage is captured by sequencing independence before interaction.

• Creative Problem Solving
• Structured Ideation Techniques