The traditional approach to process improvement focuses on identifying local efficiencies—"Go to the equipment, the value-added processes, and improve uptime, or make it cycle faster, or replace the person with automated equipment." The result might be a significant percent improvement for that individual process, but have little impact on the overall value stream. This is especially true because in most processes there are relatively few value-added steps, so improving those value-added steps will not amount to much. Without lean thinking, most people can't see the huge opportunities for
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