The goal of any business is to make money—measured by throughput (sales minus variable costs), not local efficiency or utilization rates.
Every system has one or few bottlenecks that constrain total output; optimizing non-bottleneck resources wastes money, not saves it.
Activating a resource (keeping it busy) is not the same as utilizing a resource (moving toward the goal)—excess production upstream of bottlenecks creates inventory, not profit.
The Five Focusing Steps (Apply Systematically)
Identify the system constraint (bottleneck machine, process, or capability).
Exploit it fully—extract maximum value before investing in new capacity; schedule around bottleneck demand only.
Subordinate everything else—release materials based on bottleneck needs, accept idle time on non-bottlenecks, inspect quality before bottlenecks process parts.
Elevate (improve/replace) the constraint once fully exploited—only then invest in new equipment or capacity.
Loop back to Step 1—when one constraint breaks, find the next one; never let inertia perpetuate old solutions.
Shift Measurements from "Cost World" to "Throughput World"
Stop tracking: Local efficiency %, product costs, resource utilization—these drive over-production and inventory buildup.
Make throughput the priority; only then minimize inventory and operating expense.
Bottleneck Management
Losing one hour at a bottleneck = losing system throughput for the entire plant—protect bottlenecks with 2-3 day inventory buffers upstream.
Dedicate best people to bottleneck operations; quality-inspect parts before they reach the bottleneck (don't waste bottleneck time on defects).
Maintain spare capacity on non-bottlenecks so they can rebuild buffers after disruptions without starving the bottleneck.
Practical Implementation
Release materials according to bottleneck schedule, not when upstream resources are idle—use computer scheduling to predict bottleneck demand 2-3 days ahead.
Accept visible idle time on non-bottleneck equipment; it's cheaper than carrying excess inventory.
Retrain managers—stop rewarding "keeping people busy"; reward throughput improvement and system-level thinking.
Question practices when constraints change—don't extrapolate old decisions; rebuild analysis from the new reality.
When to Pursue Unconventional Opportunities
Below-cost sales work if you have spare capacity—contribution margin covers fixed costs and increases overall throughput.
Fast delivery becomes competitive advantage when your bottleneck has breathing room.
Always validate: Calculate impact on bottleneck load and delivery commitments before scaling.
Action Plan
Map your system: Identify the one bottleneck constraining throughput (machine, person, or market demand).
Change metrics immediately: Replace local efficiency tracking with Throughput, Inventory, and Operating Expense KPIs.
Implement bottleneck buffers: Maintain 2-3 day material queue in front of bottleneck; release upstream materials only when needed.
Subordinate operations: Reprogram release schedules, staffing, and quality checks to support bottleneck throughput, not utilization.
Monitor for the next constraint: Once throughput improves, systematically identify and repeat the five steps on the emerging bottleneck.
