ESTIMATEDDate confidence: ESTIMATEDA target, not a fixed dateHow firmly the source words the date: confirmed, scheduled, estimated, delayed or unverified.Show all ESTIMATED pins65% CONFIDENCEOverall confidence: 65%How well the pin's source and references back up its dates.Weighted average of how firmly 2 references, the source included, support the pin's start and end times; a reference counts half as much for every 180 days older than the newestShow all pins from 50% to 74% confidence
Wikipedia[2] and multiple aviation histories date the Everett Factory's completion to 1967, but do not give an exact completion day.Boeing finished construction of its Everett, Washington factory in 1967 to build the 747, creating what is still the world's largest building by volume. Aerospace Manufacturing features the plant, which now also produces the 767, 777 and 787.
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