What needs to be finished first
A concrete, controversial, or ambiguous topic with at least two meaningful positions exists and directly affects attendees.
What needs to be ready before start
Inner circle of 5-7 chairs (plus 1-2 empty chairs); outer circle for observers; microphones for larger groups; visible question or thesis; optional timer for observation phases.
A facilitator who controls the sequence and chair changes; 5-7 initial discussants in inner circle; 15-50 observers in outer circle; one scribe who captures core points visibly.
Share topic or thesis in advance; indicate that inner circle is open (empty chair rule); set expectations for observers to actively listen and contribute by chair changes.
45-90 min
Inner circle with 5-7 chairs including one to two empty chairs as invitations to enter. Outer circle around inner. Discussion question visible at center. Announce rules: if someone wants to join inner circle, they take an empty chair; if occupied, they must free a seat when another arrives.
The one question this method answers
Which perspectives, arguments, and differences become visible when a focused inner circle speaks while observers can enter freely by taking a seat?
Marker: Minute
| Step | Duration | Action | Hint |
|---|---|---|---|
10-10 min | 10 min | Facilitator introduces topic, thesis, or question and explains empty chair mechanic. Identify first 5-7 discussants, invited or volunteer, and start the conversation. | Inner circle should already include diverse perspectives from the start. If only supporters or only senior people are seated, the method collapses into confirmation. The facilitator should actively seat participants. |
210-35 min | 25 min | Inner circle discusses while outer circle observes. If someone in outer circle wants to contribute, they sit in an empty chair; a member of inner circle voluntarily gives up their seat or facilitator asks after 3-4 contributions from a person. | If no seat changes happen, facilitator explicitly invites participation ("Who in the outer circle wants to add a point?"). Ten minutes of no change is a warning sign. |
335-50 min | 15 min | Second phase: facilitator introduces a reframing or new question, and may swap all inner circle participants. Bring in observations from phase one. | Without reframing, conversation loops. Preparing two to three follow-up questions or provocations prevents repetition. |
450-65 min | 15 min | Outer circle reflection: what was said, what was not said, which arguments were missing, which voices were quiet. Inner circle listens. | Reflection is part of the method, not optional. If outer circle was passive before, this phase is the most important. Make concrete observations, not judgments. |
565-80 min | 15 min | Synthesis and closing: facilitator summarizes core differences, common points, and open questions. Scribe notes visible. Optional short round: one sentence each on what each participant takes away. | Without synthesis, the method sounds like moderated debate without results. Synthesis must name tensions, not smooth them over. |
What comes out at the end
Visible live notes with core arguments, tensions, areas of alignment, and open questions, plus reflection notes from the outer circle. Optional audio recording for audit trail with consent.
Date, topic, and participant count in header. For recurring fishbowls on the same topic, document cross-references and status evolution. If audio recording exists, archive with date and consents.
Compact working template for Fishbowl Discussion with context, input, output artifacts, and next step.
Discussion format with an inner conversation circle and an outer observation or participation circle.
When and for what do we use this method?
Which data, observations, decisions, or materials are available?
Short notes along the runsheet.
Owner, date, and success signal.
Concrete filled scenario, fictional example
Concrete filled scenario, fictional example
Participants: 7 in inner circle (3 architects, 2 senior engineers, 1 PM, 1 operations engineer), 23 in outer circle. Duration: 75 min.
No further splitting without Bounded-Context analysis. Workshop on 06.05. with Domain Storytelling, owner: @marc.
Recognize symptoms and steer against them
No one takes the empty chair; the initial 5-7 people dominate the discussion for the entire session.
After 10 minutes, facilitator explicitly invites people from outer circle. If inertia repeats, adjust mechanic: after 4 contributions, inner circle must free one seat.
Participants interrupt each other, argue to win rather than build understanding, tone becomes sharp.
Facilitator intervenes: "Please restate the last statement before answering." If interruptions continue, call a pause and re-explain rules.
Observers check phones, leave room, and reflection phase is silent.
Assign reflection prompts explicitly: each person observes one thing (who speaks, which arguments are missing, emotional atmosphere). Structure reflection explicitly.
Discussion drifts across strategy, operations, tools, and people. Inner circle loses focus.
Narrow to a specific, bounded question before the start. Facilitator cuts drifting contributions: "Note it as follow-up and return to core question."
The participants with highest hierarchy occupy inner circle for the full session, junior voices are absent in both inner circle and reflection.
In phase 2, the facilitator explicitly invites underrepresented voices into the inner circle. Ask senior participants to free up seats during phase 2.
Facilitator summarizes harmoniously and key conflict points disappear from protocol.
Synthesis must explicitly state tensions. Use format: "The group is aligned on X and disagreed on Y; Z remains open."
Done signals checkable in under a minute
Go to the profile for purpose, similar methods, and sources or continue to the next method in the catalog.