Pathology laboratories frequently respond to increased demand by adding staff, assuming that throughput constraints are primarily driven by personnel. However, evidence shows that physical workflow, sample movement, and laboratory layout are the dominant factors limiting productivity. This article explores the application of lean thinking to pathology laboratories, provides multiple real-world examples, and presents practical recommendations for maximizing throughput through design, not staffing. By focusing on workflow efficiency, modular layout, and process standardization, laboratories can increase output, improve turnaround times, and reduce operational costs without indiscriminately increasing headcount.
I. The Misconception: More Staff Solves Throughput Issues
Many laboratories facing growing workloads default to hiring additional staff to meet demand. While adding personnel may temporarily relieve bottlenecks, this approach rarely addresses the underlying inefficiencies in workflow and laboratory layout.
Some common issues contributing to low throughput include:
Inefficient sample flow
Samples may move back and forth between pre-analytical, analytical, and post-analytical areas multiple timesdue to poor layout, causing unnecessary delays.
Fragmented functional zones
Different testing areas may duplicate instruments or processes, resulting in wasted space and increased labour.
Bottleneck instrumentation
Critical analysers may have limited capacity, constraining the entire process regardless of staffing levels.
Studies show that up to 30% of staff time can be consumed by non-value-added activities, such as walking to distant instruments, waiting for equipment availability, or searching for reagents. Hiring additional personnel without addressing these workflow constraints can increase labour costs while leaving throughput largely unchanged.
II. Throughput as a Workflow Problem
Throughput in pathology laboratories is a function of workflow design, not simply headcount. Optimizing sample flow minimizes unnecessary movement, reduces turnaround time, and maximizes instrument utilization.
Key strategies include:
Case Example:Â A large Sydney clinical pathology network applied workflow mapping to its laboratory and discovered that samples travelled more than 150 meters unnecessarily between testing stations. By reconfiguring the layout into a more linear workflow, they reduced sample movement by 45% and increased daily throughput without hiring additional staff.
By treating throughput as a physical and process design problem, labs can address the root causes of inefficiency rather than relying on temporary staffing solutions.
III. Lean Thinking Applied to Pathology Labs
Lean principles aim to eliminate waste, balance workflow, and focus on value-added activities. Applied to pathology laboratories, lean thinking focuses on improving sample flow, optimizing workstations, and reducing non-value-added tasks.
Key interventions include:
Industry Insight: The Royal College of Pathologists of Australasia (RCPA) recommends lean redesigns before increasing staffing levels in high-volume laboratories. Lean redesign not only improves throughput but also ensures quality and reduces operational costs.
IV. Evidence from Real-World Implementations
Several laboratories worldwide have successfully applied lean principles to increase throughput without adding staff:
Dubai Health
Centralized routine microbiology testing while maintaining rapid-response labs for urgent cases. This redesign improved reagent utilization and reduced turnaround times.
Taiwan Clinical Laboratory
Integrated total laboratory automation (TLA) with functional consolidation, minimizing manual interventions and increasing daily
test capacity.
Geisinger Medical Center, USA
Consolidated seven testing platforms into fewer high-throughput instruments, freeing up space and improving efficiency.
V. Measuring Success and Key Performance Indicators
Tracking the right KPIs ensures that workflow-focused interventions deliver measurable improvements:
- Sample travel distance (meters): Measures efficiency of layout and flow.
- Bench utilization (%): Indicates how effectively workspace is used.
- Turnaround time (hours): Tracks the speed of sample processing from receipt to result.
- Tests per FTE per day: Quantifies labor efficiency.
- Error rates / retests: Ensures process improvements do not compromise quality.
By monitoring these KPIs, laboratory leaders can make data-driven decisions and continuously refine workflow design.
VI. Practical Steps for Laboratory Leaders
Before hiring additional staff, measure sample movement, wait times, and instrument utilization.
Test flexible layouts and instrument consolidation in one section before full-scale implementation.
Include lab scientists, facility planners, and IT/LIMS specialists in planning redesigns.
Regularly track KPIs, conduct staff feedback sessions, and iterate designs to sustain efficiency gains.
Case studies show that these interventions can deliver 30â50% throughput improvements without increasing headcount, representing substantial cost savings and efficiency gains.
VII. Implementation Challenges and Solutions
Implementing lean redesign in pathology labs comes with challenges:
- Regulatory Compliance: Workflow redesign must maintain adherence to laboratory standards and accreditation requirements.
- Staff Adaptation: Changes in layout and processes may face resistance; proper training and engagement are essential.
- Instrumentation Constraints: Legacy equipment may limit flexibility, requiring phased upgrades or modular solutions.
Addressing these challenges proactively ensures sustainable gains in throughput and operational excellence.
VIII. Conclusion
Throughput limitations in pathology laboratories are primarily a design problem, not a staffing problem. By focusing on workflow efficiency, modular layout, and lean principles, labs can increase output, improve turnaround times, reduce costs, and future-proof their facilities. Investing in workflow design and physical layout optimization consistently delivers greater returns than adding staff without addressing the root causes of inefficiency.