| 1. | Hiroyuki Hirano, 5 Pillars of the Visual Workplace: The Sourcebook for 5S Implementation (Portland, OR: Productivity Press, 1990), pp. 2531. | 2. | James P. Womack, Daniel T. Jones, Daniel Roos, The Machine That Changed the World: The Story of Lean Production (New York: Harper-Collins, 1991). | 3. | Taiichi Ohno, Toyota Production System: Beyond Large-Scale Production (New York: Productivity Press, 1988). | 4. | Op cit Hirano, pp. 1318. |
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