In the world of process improvement and operational excellence, the Theory of Constraints (TOC) offers a powerful framework for transforming organizational performance. Among its five focusing steps, the principle of “subordinate everything” stands as a critical yet often misunderstood concept that can dramatically improve your business outcomes. This comprehensive guide will walk you through the practical application of subordinating everything to your constraint, ensuring you maximize throughput and achieve sustainable results.
Understanding the Concept of Subordination
Subordination, in the context of the Theory of Constraints, refers to the strategic alignment of all non-constraint resources and processes to support and maximize the performance of the constraint. Simply put, it means that every element of your system should work in harmony to ensure that your bottleneck operates at peak efficiency without interruption. You might also enjoy reading about How to Create and Use an Optimization Plot for Process Improvement: A Complete Guide.
The principle recognizes a fundamental truth: your system’s overall performance is only as strong as its weakest link. Therefore, having non-constraint resources operating at maximum capacity while the constraint sits idle or starved for work represents a serious waste of organizational resources. You might also enjoy reading about How to Create an Arrow Diagram: A Complete Guide to Project Scheduling and Network Planning.
Why Subordination Matters in Process Improvement
Consider a manufacturing facility producing electronic components. If your constraint is a specialized testing machine that can process 100 units per hour, it makes no sense for the assembly line before it to produce 150 units per hour. The excess 50 units simply accumulate as work-in-process inventory, tying up capital and floor space without adding value.
Subordination addresses three critical business challenges:
- Prevents the accumulation of excess inventory that ties up working capital
- Reduces confusion and chaos in the workplace caused by misaligned production rates
- Ensures that the constraint never sits idle due to lack of work or improper scheduling
Step-by-Step Guide to Subordinating Everything
Step 1: Identify Your System’s Constraint
Before you can subordinate everything, you must clearly identify where your constraint lies. This requires careful analysis of your entire value stream. Track the flow of work through each process step and measure capacity, utilization, and throughput at each stage.
Example Dataset: A customer service operation analyzed their process and discovered the following capacity data:
- Initial Contact Processing: 200 calls per hour
- Technical Assessment: 120 calls per hour
- Solution Implementation: 180 calls per hour
- Quality Verification: 150 calls per hour
In this scenario, Technical Assessment at 120 calls per hour is clearly the constraint.
Step 2: Establish the Constraint’s Operating Schedule
Once identified, your constraint should never sit idle during productive hours. Create a schedule that maximizes the constraint’s operating time. This might include ensuring preventive maintenance occurs during planned breaks, cross-training backup personnel, and establishing clear protocols for prioritizing work.
Using our customer service example, the Technical Assessment team should have a structured schedule that includes adequate breaks, minimal meetings during peak hours, and backup staff available to cover absences. If the team works an eight-hour shift, aim for at least 7.5 hours of productive time, accounting for necessary breaks.
Step 3: Synchronize Non-Constraint Resources
This represents the heart of subordination. All upstream and downstream processes must align their pace with the constraint. Upstream processes should produce just enough to keep the constraint fed, while downstream processes should have sufficient capacity to handle the constraint’s output.
Practical Implementation: In our customer service scenario, Initial Contact Processing should intentionally slow down or redirect resources. Instead of processing 200 calls per hour, they should aim for approximately 120 calls per hour to match the constraint’s capacity. The extra staff capacity can be redirected to support Technical Assessment or improve quality in other areas.
Step 4: Create Buffer Management Systems
To protect your constraint from disruption, establish time buffers before it. This ensures that if upstream processes experience temporary issues, the constraint continues operating without interruption.
For a manufacturing environment, this might mean maintaining a buffer of 2-3 hours of work before your constraint machine. In our customer service example, you might maintain a queue of 15-20 pre-assessed calls ready for the Technical Assessment team, ensuring they always have work available.
Step 5: Adjust Performance Metrics and Incentives
Traditional efficiency metrics often drive counterproductive behaviors. When you measure each department solely on its individual output, you encourage overproduction at non-constraints. Instead, align metrics with system-level throughput.
Sample Metric Transformation:
Traditional approach: Measure Initial Contact Processing team on calls handled per hour (encouraging maximum output of 200 calls/hour).
Subordinated approach: Measure Initial Contact Processing team on proper handoffs to Technical Assessment, quality of information provided, and overall system throughput (encouraging the right output of 120 calls/hour with superior quality).
Common Challenges and Solutions
Cultural Resistance
Team members at non-constraint resources may feel their value is diminished when asked to slow down. Address this through clear communication about system thinking and how their role in protecting the constraint actually increases overall value delivery.
Management Misconceptions
Leaders often struggle with the idea of “idle” resources. Help them understand that apparent idle time at non-constraints represents hidden capacity that can be strategically deployed for improvement activities, cross-training, or supporting the constraint.
Dynamic Constraints
In some environments, constraints shift based on product mix or demand patterns. Establish monitoring systems that detect constraint movement and adjust subordination strategies accordingly. Weekly capacity reviews can help identify these shifts before they create problems.
Measuring Success in Subordination
Track these key indicators to ensure your subordination efforts deliver results:
- Constraint uptime percentage (target: above 95% during scheduled production time)
- Buffer penetration frequency (how often the protective buffer is fully consumed)
- Overall system throughput (measured in completed units or revenue)
- Work-in-process inventory levels (should decrease after proper subordination)
- Lead time from start to finish (typically improves with subordination)
Real-World Results
A medical device manufacturer implemented subordination principles across their production line. Their constraint was a sterilization chamber with capacity for 500 units per day. Prior to subordination, upstream processes produced 700 units daily, creating significant work-in-process inventory.
After implementation, they adjusted upstream production to 520 units per day (a slight buffer for variation) and redirected excess labor capacity to support faster changeovers at the constraint. Within three months, they achieved a 23% increase in actual throughput despite producing fewer units at non-constraints, reduced work-in-process inventory by 40%, and improved on-time delivery from 78% to 94%.
Taking Your Knowledge Further
Understanding subordination represents just one element of comprehensive process improvement methodology. The Theory of Constraints, combined with Lean Six Sigma tools, creates a powerful framework for organizational transformation. However, successful implementation requires both theoretical knowledge and practical application skills.
Professional training provides the structured learning environment, case studies, and expert guidance necessary to confidently apply these principles in your organization. Whether you are a manager seeking to improve departmental performance, a process improvement professional expanding your toolkit, or an executive driving organizational change, formal certification offers invaluable benefits.
Conclusion
Subordinating everything to your constraint represents a paradigm shift from traditional efficiency thinking to system optimization. By aligning all resources to support your bottleneck, you unlock hidden capacity, reduce waste, and dramatically improve overall performance. The principle challenges conventional wisdom about keeping everyone busy, instead focusing on keeping the right resources busy at the right time.
Implementation requires careful analysis, clear communication, adjusted metrics, and ongoing management. However, organizations that successfully embrace subordination consistently achieve remarkable results: higher throughput, lower inventory, improved quality, and better customer satisfaction.
The journey toward operational excellence demands both knowledge and commitment. If you are serious about transforming your organization’s performance and mastering proven methodologies like the Theory of Constraints and Lean Six Sigma, now is the time to invest in your professional development.
Enrol in Lean Six Sigma Training Today and gain the comprehensive skills needed to identify constraints, implement subordination strategies, and drive measurable improvements in your organization. Professional certification provides you with recognized credentials, practical tools, and a network of improvement professionals. Do not let another day pass watching potential productivity gains slip away. Take action now and position yourself as a leader in operational excellence.
