Definitely "The Machine That Changed the World" by Womack, Jones, and Roos [0]. This is "the first book to reveal Toyota's lean production system." Before reading it, I had never imagined just-in-time production or value chain mapping, or vehicle assembly lines that can profitably produce quantity one of a product before being reconfigured to produce a different model (SMED: single minute exchange of die).
Now I see muda everywhere and cringe when I overhear people talking about applying kaizen and how they think they're practicing "continuous improvement" while repeating the same rote, industrial, mindless processes that they have been for the last 40 years. We can do so much better. Toyota tried very hard to teach GM how at their NUMMI[1] plant, but it wasn't the right location relative to their suppliers for JIT to fully work and "It is difficult to get a man to understand something, when his salary depends on his not understanding it." -Upton Sinclair
Now I see muda everywhere and cringe when I overhear people talking about applying kaizen and how they think they're practicing "continuous improvement" while repeating the same rote, industrial, mindless processes that they have been for the last 40 years. We can do so much better. Toyota tried very hard to teach GM how at their NUMMI[1] plant, but it wasn't the right location relative to their suppliers for JIT to fully work and "It is difficult to get a man to understand something, when his salary depends on his not understanding it." -Upton Sinclair
[0] https://www.lean.org/Bookstore/ProductDetails.cfm?SelectedPr... [1] https://en.wikipedia.org/wiki/NUMMI