Industrial Pharmacy · Short notes

Scale Up and Technology Transfer: Short Notes & Cheat Sheet

Moving from laboratory to pilot to commercial scale, problems at each unit operation, SUPAC change levels and the technology transfer process.

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Short notes

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From laboratory to market

Each step raises batch size and changes equipment, so each needs its own verification.

Scale-up

Products move from laboratory (bench) batches to pilot batches and then to commercial production.
For oral solids a pilot batch is commonly at least one-tenth of the commercial batch or 100,000 units, whichever is larger.
Mixing and granulation change with scale, so similar geometry, impeller tip speed and end-point measures (power consumption, torque) are used.
Drying, heat transfer, compression speed (dwell time) and coating spray rate also behave differently at larger scale.
Parameters that worked in the laboratory must be re-established and validated at each scale.

Post-approval changes (SUPAC)

The FDA's SUPAC guidance (Scale-Up and Post-Approval Changes) classifies changes to composition, site, batch size, equipment and process.
Level 1 changes are minor and unlikely to affect quality. Level 2 changes could have a significant effect. Level 3 changes are likely to have a significant effect.
Separate guidance exists for immediate-release (SUPAC-IR), modified-release (SUPAC-MR) and semisolid (SUPAC-SS) products.
Higher-level changes need more supporting data (dissolution, stability, sometimes bioequivalence) and prior regulatory approval.

Technology transfer

Technology transfer moves product and process knowledge from development to manufacturing, or from one site (sending unit) to another (receiving unit).
Key documents: transfer protocol, master formula, process description, specifications, analytical methods and a risk and gap assessment.
Analytical methods are transferred by comparative testing between the two laboratories.
The receiving site completes validation (PPQ) batches, and a transfer report closes the project.
Changes of site or process must also be approved by the regulator (in Pakistan, DRAP) before product is released.

Cheat sheet

High-yield facts in one place. Cover the right-hand column and test yourself.

SUPAC levels

Level	Likely impact on quality
Level 1	Unlikely to have a detectable impact
Level 2	Could have a significant impact
Level 3	Likely to have a significant impact

Scale-up issues by operation

Operation	What changes
Mixing	Shear, tip speed, blend time
Wet granulation	End point (power, torque)
Drying	Air flow, heat transfer, time
Compression	Press speed, dwell time
Coating	Spray rate, pan load, temperature

Memory aids

Lab → Pilot (1/10) → Plant: A pilot batch is typically at least one-tenth of full scale.

Exam traps

A process that works at laboratory scale is not automatically valid at commercial scale.
Level 3 SUPAC changes need the most supporting data.
Technology transfer includes analytical methods, not just the manufacturing process.
The sending unit gives the knowledge; the receiving unit must validate the process at its own site.

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