A fishbone diagram (also called an Ishikawa or cause-and-effect diagram) is a structured visual tool for cause analysis: it maps the possible causes of a specific problem or effect along branching categories arranged in a skeletal layout resembling a fish skeleton, with the effect at the head and cause categories as the main bones, each further subdivided into sub-causes. It persists as a discipline artifact — taught in quality management and reliability engineering, reproduced in standard templates, and sustained through organizational practice. [formal: causa-effectus | substrate: behavior | horizon: a moment | explicit: yes | epoch: 0.49]
Accepted ontology entry
fishbone-diagram
A fishbone diagram (also called an Ishikawa or cause-and-effect diagram) is a structured visual tool for cause analysis: it maps the possible causes of a specific problem or effect along branching categories arranged in a skeletal layout r…
Definition
Why it is in scope
A visual cause-analysis tool: a diagram that arranges potential causes of a problem along branching categories radiating from a central spine, named after its bone-like structure. Created by Kaoru Ishikawa in the 1960s for quality control, it maps causal factors to effects to guide systematic root-cause investigation.
Names and aliases
- fishbone-diagramen · CANONICAL
Relations from this entry
- cmrwnrieo00qrsoacvm1msqk2INSTANCE_OF →
A fishbone diagram IS a specific kind of diagram. The fishbone (Ishikawa) diagram is a visual cause-analysis tool that arranges potential causes along branching categories. A competent speaker would call it 'a diagram.' Pinned sense: the visual/structural kind (not the procedural sense of 'diagram').
- cms8a929t007573fkafm8ap7iSERVES →
Fishbone diagram (Ishikawa diagram) is built and maintained for the sake of risk management — it systematically arranges potential causes of a problem along branching categories, providing the structured cause-analysis that risk management needs to identify, analyze, and evaluate risks. Law 8d: servant (fishbone-diagram) → master (risk-management). Purpose is by design: the diagram exists as a tool within risk management practice.
- cms8fls9600pv73fklpt543o4INSTANCE_OF →
A fishbone diagram (Ishikawa diagram) IS a specific kind of cause-analysis technique. It is a structured analytical method for identifying the underlying origins of problems by collecting evidence of causal factors and mapping their relationships — a diagrammatic form of cause-analysis.
- cms82vo3z00odh6s86r3hkpihSERVES →
For whose sake? The fishbone diagram (Ishikawa diagram) is designed specifically to serve root-cause analysis — its branching structure maps causes to effects to help teams identify contributing factors. It is built and maintained for that purpose. Direction: fishbone-diagram → root-cause-analysis (servant → master).
- cms8hv4kr00xq73fkv0rpdis4DERIVED_FROM →
which-came-first: the concept of a root cause (a fundamental underlying reason behind failure) predates fishbone/Ishikawa diagrams by centuries. The fishbone diagram was developed in the 1960s specifically as a visual method to trace effects back to root causes — it built on the older, more general concept.
Relations to this entry
No accepted relations in this direction.
Record identity
- Created
- Jul 31, 2026, 3:59 AM UTC
- Content hash
- 8340c1f3cedc21cfb00ad358db4893b4166e4e5e1632ca733a835684711ae146