I am convinced that Lean thinking and work patterns are crucial for IT-related change projects and the IT Service Management portfolio. When I am seeking inspiration I dive into:
Lean Production Simplified, Third Edition: A Plain-Language Guide to the World’s Most Powerful Production System 
(book) by Pascal Dennis. Dennis in his 3rd Ed. includes specific material on bridging from the factory floor to knowledge work. The argument that LEAN is important to knowledge work is persuasive – the challenge is in application.
The Remedy: Bringing Lean Thinking Out of the Factory to Transform the Entire Organization 
(book) by Pascal Dennis. Not as sharp as “Lean Simplified” but a useful guide to bridging across from production to business contexts.