Definition
Regression is a statistical method used to model relationships between variables and estimate the value of one variable from one or more others.
Human Explanation
Regression helps describe how an outcome tends to change when one or more explanatory variables change.
Why it Matters
It supports predictive modelling and the systematic analysis of relationships found in data.
Conceptual Boundary
Regression describes statistical relationships, but does not by itself establish causation. Its results also depend on model assumptions, data quality and the variables included in the analysis.
Practical Perspective
Regression is widely used in sales forecasting, cost analysis, risk assessment and process modelling. A useful model must be validated for its intended context rather than judged only by how closely it fits historical data.