The Lean Aerospace Initiative [the broken link was removed] at MIT has a large number of reports, case studies and articles available online.
The Initiative was formally launched as the Lean Aircraft Initiative in 1993 when leaders from the U.S. Air Force, MIT, labor unions, and defense aerospace businesses forged a trail-blazing partnership to transform the industry, reinvigorate the workplace, and reinvest in America using a philosophy called “lean.”
The Initiative’s stated mission is to research, develop, and promulgate practices, tools, and knowledge that enable and accelerate the envisioned transformation of the greater United States aerospace enterprise through people and processes.