Our engineers say the coding agent makes them 20% faster. Before we buy 2,000 more licences, how do you find out if that's true?

In one randomised trial, developers believed AI made them 20% faster while it made them 19% slower. Run staggered access on real work, measure time to merge and defects, and renew team by team.

Updated Nov 2026 · Original practice questions with worked answers and teaching rubrics. Our editorial policy explains the sources, review process and limits.