Question Decomposition
Definition
Question decomposition breaks complex questions into smaller sub-questions.
Splitting a complex question into smaller sub-questions that are answered separately and then combined.
Simply explained
A difficult question is broken down into more manageable pieces whose answers must then fit together.
Why it matters in practice
The term helps to select, develop, evaluate AI systems in a well-founded manner and realistically assess their technical risks.
Example from business
"Which locations grew despite declining margins?" is broken down into revenue, margin, and comparison queries.
Limits and pitfalls
- Losing dependencies between sub-questions or combining faulty partial results without verification.
Origin & history
The approach originates from logical reasoning and QA and is now also used in multi-step retrieval and agent systems.
Use in mid-sized companies
- Possible application: "Which locations grew despite declining margins?" is broken down into revenue, margin, and comparison queries.
Frequently asked questions
What does question decomposition mean?
Splitting a complex question into smaller sub-questions that are answered separately and then combined. What mistakes should be avoided? Losing dependencies between sub-questions or combining faulty partial results without verification.
Sources
Source checked on 10.10.2026. Editorial application examples are hypothetical; no evidence of real customer results.
Editorially reviewed on: