Did McKinsey just lift the inner/outer loop concept here with no attribution? Does it also predate this article? https://www.mckinsey.com/industries/technolo

Did McKinsey just lift the inner/outer loop concept here with no attribution? Does it also predate this article? https://www.mckinsey.com/industries/technology-media-and-telecommunications/our-insights/yes-you-can-measure-software-developer-productivity https://www.mckinsey.com/industries/technology-media-and-tel...