expression

proof of concept

a small test showing an idea can work

In more detail

1. (expression) a small project or demonstration that shows a new idea or technology can work in practice before it is developed fully

2. (expression) evidence or test results that confirm something is possible or will work as intended

Examples

1. The startup built a proof of concept to show investors that their app idea was viable.
2. We ran a proof of concept in the lab before investing millions in the full production facility.

How to use proof of concept

Proof of concept is used in technology, business, and research contexts to describe a preliminary demonstration that validates an idea before full-scale investment or development. It emphasizes showing feasibility rather than creating a finished product. The term is neutral and practical, commonly found in project proposals, investor pitches, and development roadmaps.

Common phrases

proof of concept phase
develop a proof of concept
proof of concept stage
proof of concept project
serves as a proof of concept

Synonyms

prototype · trial · pilot project · feasibility study · working model

A common mistake

Learners sometimes use it interchangeably with 'prototype' or 'minimum viable product', but proof of concept is specifically about demonstrating that something can work in principle, while a prototype is already a working model, and an MVP is a product ready for early users.

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