Risk-Based Selection of Environmental Classifications for Biopharmaceutical Operations

Area of Science:

• Pharmaceutical Manufacturing
• Environmental Risk Assessment
• Biopharmaceutical Facilities

Background:

• Current biopharmaceutical facility designs often exceed necessary environmental controls for non-sterile drug substance manufacturing.
• Technological advancements, particularly closed systems, allow processes to occur in controlled environments, yet facility designs lag behind.
• Overly complex facility designs lead to increased capital and operational costs.

Purpose of the Study:

• To propose a formal risk assessment-based methodology for assigning environmental classifications during the early design phase of biopharmaceutical facilities.
• To facilitate the selection of appropriate environmental conditions for different process steps.
• To support the implementation of closed systems and reduce the reliance on classified cleanrooms.

Main Methods:

• Developed a risk assessment methodology evaluating environmental contamination risk to product quality and patient safety.
• Assessed factors including growth potential (time, nutrients, temperature), bioburden limits, system closure level, and contamination detectability.
• Defined practical criteria for closed systems, building on International Society for Pharmaceutical Engineering (ISPE) guidance.

Main Results:

• The methodology assigns environmental classifications based on a formal risk assessment.
• Closed system operations are determined to require only controlled, not classified, environments.
• The study demonstrated that increased environmental classification beyond controlled levels offers no additional product protection for closed systems.

Conclusions:

• The proposed risk-based methodology effectively reduces facility complexity and costs.
• Implementing closed systems significantly minimizes the need for classified areas in biopharmaceutical manufacturing.
• This approach ensures patient safety and product quality while optimizing facility design and operational expenses.