Organizations whose website was read (archived pages, 2008 to 2026 for the federal builders of the panel; a recent snapshot, 2024 to 2026, for the rest of the frame). Provisional: the dictionary is not yet validated.
Federal builders of the panel with a dated commitment. A commitment is dated by the first observed year with lean language confirmed by a second page. Years without archive coverage are unknown, not zero; Common Crawl coverage starts in 2013.
Share of ENR Top 400 contractors (2025 list) ever listed as an LCI member (2013 to 2026) and listed in 2026, with 95% Wilson intervals.
Corporate directory, 2026, by organization type; organizations listed each year by the year first listed (archived directories 2013 to 2026; 2018 has no archive).
Select an organization.
Specific routines name lean construction practice on their own; generic tools count only on a page that also has lean language or a specific routine. Pages with the term, not pages about it.
Panel organizations with lean language: number that name both methods anywhere on the archived site.
First archived year in which each organization's site names the method. Archive coverage is thin before 2013 and uneven after; a first year is an upper bound on when the method was first named.
SAM.gov Contract Opportunities, construction notices (NAICS 23 and construction classification codes), FY2008 to FY2026; distinct solicitations with a full text. Lean methods: Last Planner, pull planning, target value design, Big Room, takt, choosing by advantages, Lean Construction Institute, lean construction.
USAspending prime contract awards, NAICS 23, with corrected definitions and nine restrictions (153,355 usable awards, FY2008 to FY2026); here the awards of the 444 panel firms. Pricing type, extent of competition and kind of work as recorded in FPDS.
Owner members of the Lean Construction Institute, 2026, by sector; owners are the organizations that can require lean on their projects.
Project pages with lean language, read by three local language models with fixed categories and a verbatim quote checked against the page. Records so far come from the first six firms read; a hand check is pending.