The Problem
A CAP/CLIA clinical genomics lab needed to scale Sanger sequencing volume without adding headcount. The instrumentation and automation were already in place. The constraint was the system architecture.
The workflow had been assembled incrementally: automation bolted onto manual processes, cleanup chemistry inherited from earlier protocols, sample tracking layered in by hand. Each component worked in isolation, but they had never been designed to function as an integrated system.
As a result, scaling was blocked by the architecture itself:
- Bead-based cleanup introduced variability and required frequent operator intervention.
- Manual steps were embedded inside automated processes, preventing unattended execution.
- Sample tracking relied on handwritten labels with no system-level traceability.
- Licensed CLS time was consumed by routine execution rather than critical oversight.
- Automation movement patterns increased runtime, contamination risk, and deck complexity.
The lab did not need more technology. It needed the existing technology re-architected into a system that could scale.
System Architecture Redesign
Defined a new end-to-end system architecture that aligned assay chemistry, automation logic, operator workflow, clinical oversight, and sample tracking into one integrated design.
The redesign treated the workflow as a single system rather than a collection of components:
"No amount of optimization within the existing architecture could unlock the throughput the lab needed."
- Replaced bead-based cleanup with a 96-well filtration plate workflow, eliminating the primary source of variability and operator intervention.
- Redesigned automation workflow to reduce setup time, deck movement, and flyover risk.
- Restructured operator interaction to separate routine execution (technician) from critical oversight (CLS witnessing at defined control points).
- Replaced handwritten labeling with barcode-based tracking integrated into the workflow architecture.
- Consolidated the end-to-end process so a single operator could execute the full workflow at 10x volume.
Outcomes
- Throughput scaled from 96 samples/week to 192 samples/day.
- CLS hands-on time reduced from ~2 hours to 5 minutes.
- Total hands-on time reduced to ~45 minutes (technician) plus 5 minutes (CLS).
- Single-operator workflow maintained at 10x throughput.
- Bead-based cleanup variability eliminated.
- Contamination risk reduced through redesigned deck layout and movement patterns.
- Auditability improved through integrated barcode tracking.
Why This Worked
The original workflow was never designed as a system. It was assembled over time, and each addition created new dependencies, intervention points, and failure modes. No amount of optimization within the existing architecture could unlock the throughput the lab needed.
The shift was architectural: designing how assay chemistry, automation, operator roles, and tracking related to each other as one system. That produced a workflow that was simpler, more scalable, and more reliable, without adding instrumentation, headcount, or operational risk.