The Research Onion Explained
Saunders' "Research Onion" is one of the most widely used frameworks for structuring a dissertation methodology chapter, particularly in UK business and social science degrees. Here's each layer explained in plain language, from the outside in.
What Is the Research Onion?
The Research Onion is a visual framework, developed by Mark Saunders and colleagues, that breaks methodological decision-making into six concentric layers — from broad philosophical assumptions on the outside, down to specific data collection and analysis techniques at the centre. Working through it layer by layer helps ensure your methodology is coherent from top to bottom.
Layer 1: Research Philosophy
Your outermost layer — your underlying assumptions about knowledge and reality. Common positions include positivism (knowledge is objective and measurable), interpretivism (knowledge is socially constructed and context-dependent), and pragmatism (using whatever approach best answers the research question).
Layer 2: Research Approach
Whether you're testing existing theory (deductive) or building theory from your data (inductive), or combining both (abductive). Deductive approaches typically pair with quantitative, positivist research; inductive approaches typically pair with qualitative, interpretivist research.
Layer 3: Methodological Choice
Whether your study is mono-method quantitative, mono-method qualitative, or mixed methods — combining both within a single study.
Layer 4: Research Strategy
The overall strategy used to carry out your research, such as a survey, case study, experiment, ethnography, action research, or grounded theory.
Layer 5: Time Horizon
Whether your study captures a single snapshot (cross-sectional) or change over time (longitudinal) — most dissertations, given time constraints, are cross-sectional.
Layer 6: Techniques and Procedures
The innermost layer — your specific, practical data collection and analysis techniques: interviews, questionnaires, secondary data, statistical tests, or thematic coding.
Why Coherence Between Layers Matters
Examiners often look for consistency running through all six layers. Claiming an interpretivist philosophy while running a purely statistical, hypothesis-testing study, for example, is a common inconsistency that raises questions. Working outward-in, or checking each layer against the others once drafted, helps catch this kind of mismatch before submission.
Key Takeaways
- The Research Onion moves from broad philosophy down to specific techniques across six layers
- Each layer should be logically consistent with the ones around it
- Positivism/deductive/quantitative and interpretivism/inductive/qualitative are common (though not compulsory) pairings
- Most dissertations are cross-sectional given typical time constraints
The Research Onion Explained FAQs
It's not universally required, but it's widely used and expected in many UK business and social science dissertations because it provides a clear, examinable structure — check with your supervisor if you're unsure.
Pragmatism, as a philosophy, explicitly allows combining elements based on what best answers your research question, though this should be a deliberate, justified choice rather than an inconsistency.
It originated in a business research context and is most common there, though some other social science and applied fields also use it or adapt it.