EN (Book) - Wallace Hopp, Mark Spearman - Factory Physics - 6: The Law of Variability Buffering

In Part 6, we dive deep into one of the most unforgiving realities of operations management: The Law of Variability Buffering. Building on our previous discussions, we establish that variability cannot be ignored—it will be buffered. The only choice you have is how you pay for it. We break down the financial and operational trade-offs between the three universal buffers—Inventory, Capacity, and Time—and explain how to transition from being a victim of floor chaos to a master tactician by engineering flexibility directly into your plant. What You’ll Learn: The strict trade-offs dictated by the Law of Variability Buffering. How to balance your "three universal buffers" to minimize total operational costs. The compounding hidden tax that unbuffered variability places on your bottom line. Real-world examples of how flexible capacity and inventory nesting protect customer lead times.