Good to Great: Why Some Companies Make the Leap... and Others Don'tTo find the keys to greatness, Collins's 21 person research team read and coded 6,000 articles, generated more than 2,000 pages of interview transcripts and created 384 megabytes of computer data in a five year project. The findings will surprise many readers and, quite frankly, upset others. The ChallengeBuilt to Last, the defining management study of the nineties, showed how great companies triumph over time and how long term sustained performance