Process development & scale up
Developing a sterile pharmaceutical product involves far more than designing an effective formulation. Manufacturing processes must also be developed to ensure products can be produced safely, consistently and at the scale required for clinical trials and commercial supply. This is particularly important for aseptically manufactured medicines, where sterility must be maintained throughout the fill-finish process.
Why Process Development Matters
Many sterile medicines cannot be terminally sterilised after filling because heat or radiation would damage the product. Instead, they are manufactured using aseptic processing, where each stage of production is carefully controlled to prevent microbial contamination.
A well-developed aseptic process helps ensure product quality, patient safety and regulatory compliance while reducing the risk of delays during technology transfer or scale-up.
Designing a Scalable Process
One of the key objectives during process development is to create a manufacturing process that can evolve alongside a product's development. Early-stage clinical manufacturing may only require laboratory or bench-scale equipment, while later phases demand increased production volumes.
Designing with scalability in mind allows manufacturers to retain the same underlying process as production moves from laboratory development through pilot manufacture to commercial production. This reduces the need for extensive process redesign and supports smoother technology transfer.
Applying Quality by Design
Many manufacturers adopt Quality by Design (QbD) principles during process development to build quality into the manufacturing process rather than relying solely on end-product testing.
This approach involves understanding how Critical Quality Attributes (CQAs), Critical Material Attributes (CMAs) and Critical Process Parameters (CPPs) interact. By identifying these relationships early, manufacturers can define robust operating ranges that support consistent product quality throughout scale-up.
Functional prototypes and ergonomic mock-ups are often used to evaluate both the manufacturing process and operator interactions before production equipment is finalised. This can help identify practical challenges early, reducing technical risk later in development.
Scaling Up Aseptic Manufacturing
Once a process has been established, it can be transferred to larger-scale manufacturing equipment. The objective during scale-up is to increase production capacity while maintaining the same product quality, sterility assurance and process performance demonstrated during development.
Depending on manufacturing requirements, organisations may choose to:
- Scale up, by increasing batch size or equipment capacity.
- Scale out, by replicating validated production lines to increase overall throughput.
Both approaches require careful consideration of process controls, equipment design and facility layout to ensure consistent performance.
Supporting Novel Manufacturing Processes
While many aseptic fill-finish operations use established production equipment, innovative medicines and drug-device combination products often require bespoke manufacturing solutions. Novel container formats, powder formulations or specialised delivery devices may introduce process steps that standard equipment cannot accommodate.
In these situations, custom automation and purpose-designed containment systems can enable manufacturers to develop reliable, repeatable aseptic processes while maintaining sterility throughout production.
From Development to Commercial Manufacture
Successful aseptic process development is about more than achieving sterility in the laboratory. It involves creating a manufacturing process that is robust, scalable and capable of supporting a product throughout its lifecycle.
By considering process design, equipment selection, ergonomics and scalability from the earliest stages of development, manufacturers can reduce technical risk, simplify technology transfer and support efficient commercial manufacture.