Issue Tree
A problem split into parts that do not overlap
- PhaseFrame
- Group3 to 8 people
- Time45 minutes
- SettingRoom or remote
- ExecutivesBetter with a working team
What it is
An issue tree splits a large question into branches that do not overlap and together cover the whole question. Each branch is split again until the pieces are small enough to answer with evidence.
When to use it
When a problem is large, and the team needs to divide it so each part can be examined and owned.
When to skip it
When the problem is already small and specific.
How to run it
- 5 minWrite the key question at the left.
- 15 minSplit it into three or four branches that do not overlap and together cover the whole.
- 15 minSplit each branch again until each leaf can be tested or owned.
- 10 minMark the leaves where you have evidence, and those where you are guessing.
About 45 minutes of method time. Add ten to fifteen minutes to open and close the session.
What to watch for
Branches that overlap, or that do not add up to the whole. Check that the branches together cover the problem and do not repeat each other.
The AI lens
Make sure data, people and risk have a branch. Most trees fixate on technology and process.
What you leave with
A structured breakdown, with evidence and guesses marked, from which you can assign work.
An example
'Why is customer onboarding slow?' can branch into the tasks, the data and the people involved. Branching this way makes sure the team does not look only at the tasks and miss a data problem.
How it compares
An Issue Tree structures the question before you look for answers. A Fishbone collects causes you already suspect.
Related methods
Questions
What is Issue Tree?
An issue tree splits a large question into branches that do not overlap and together cover the whole question. Each branch is split again until the pieces are small enough to answer with evidence.
When should I use Issue Tree?
When a problem is large, and the team needs to divide it so each part can be examined and owned.
How long does Issue Tree take and how many people do I need?
Issue Tree takes about 45 minutes and suits 3 to 8 people, plus a facilitator. Add ten to fifteen minutes to open and close the session.
How is Issue Tree different from other methods?
An Issue Tree structures the question before you look for answers. A Fishbone collects causes you already suspect.
Can I run Issue Tree remotely or with executives?
Yes. Issue Tree works in the room or remotely. Remotely, put the canvas on a shared board in advance and write silently in the board, not in chat. Executives: Better with a working team.