Analyze · Interactive CI tool

Fishbone / Ishikawa

A fishbone, or Ishikawa diagram, groups possible causes of an observed effect into categories. The branches organize ideas without proving that an idea is true.

Open Fishbone / Ishikawa Read the full guide

Read freely. Creating a worksheet requires a verified free beta account. No payment or manual beta approval.

When this tool helps

Use it during early investigation when the team needs a broad, organized set of hypotheses.

It helps a mixed team explore explanations beyond the most obvious person or department.

When to choose another method

Use Root Cause Analysis Builder for detailed validation or 5 Whys to investigate one branch more deeply. Use Pareto to prioritize measured categories.

How to use it in CI Tools

Read the guide and agree the question, definitions and required starting information.
Open a separate blank worksheet or the built-in synthetic practice sample. Follow the tool-specific steps and review its warnings.
Check the interpretation and save an editable .citools file to your computer. Keep reports as separate exports.

Follow the Fishbone / Ishikawa instructions step by step

Fictional example snapshot

Packing-label mismatch

A fictional warehouse investigates label errors.

Selected details from the worked example
Equipment	Printer settings differ between stations
Method	Two label templates remain accessible
People / environment	Handover information and interruptions may influence selection

These figures illustrate the method; they are not clinical instructions, universal targets or verified results from a real organization.

Read the complete worked example and its interpretation

Learn the method, then put it into practice

The full guide includes prerequisites, interface-specific steps, two fictional examples, common mistakes and interpretation help. It is available without registration.

Fishbone / Ishikawa: guide & examples