In today’s competitive pharmaceutical environment, cost optimization, regulatory compliance, and speed to market are critical success factors. While Quality by Design (QbD) provides the scientific foundation, Lean Six Sigma (LSS) adds the operational excellence framework to ensure formulations are developed right the first time.
What is Lean Six Sigma in Pharma R&D?
- Lean focuses on eliminating waste (time delays, redundant tests, excess material use, unnecessary steps).
- Six Sigma focuses on reducing variability (consistent blending, precise granulation, reproducible dissolution).
- Together, they transform formulation R&D into a data-driven, efficient, and patient-focused process.
A Formulation Example – Tablet Project
During the development of a bilayer tablet, repeated pilot batches faced sticking and picking issues during compression, causing delays and material wastage.
Applying the DMAIC cycle (Lean Six Sigma):
- Define – Problem statement: 25% batch rejections due to sticking, causing 3-month delay in BE studies.
- Measure – Collected data on compression force, dwell time, lubricant level, and humidity conditions.
- Analyze – Identified binder concentration and granule moisture as critical sources of variability.
- Improve –
- Conducted DoE to optimize binder % and drying endpoint.
- Introduced PAT (NIR moisture sensor) to monitor granule moisture in real-time.
- Adjusted compression RPM for smoother operation.
- Control – Standardized in-process controls (granule LOD, tablet ejection force) to ensure future robustness.
Outcome:
- Batch rejections dropped from 25% to less than 2%
- Saved approximately $50000 annually in rework and material wastage
- Achieved consistent tablet quality with faster project completion
Why Lean Six Sigma Matters in Formulation R&D
- Reduces cost of goods (GC%) through yield improvements and excipient optimization.
- Accelerates development timelines, supporting faster BE studies and dossier filing.
- Builds regulatory confidence, since processes are backed by data and variability control.
- Ensures quality, safety, and efficacy for the patient.
Conclusion
Lean Six Sigma is not limited to manufacturing. When applied early in formulation development, it transforms challenges into opportunities—delivering robust, compliant, and cost-effective products for global markets.
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Resource Person: Moinuddin Syed. Ph.D, PMP®