PDA Technical Glossary
PDA Technical Reports are highly valued membership benefits because they offer expert guidance and opinions on important scientific and regulatory topics and are used as essential references by industry and regulatory authorities around the world. These reports include terms which explain the material and enhance the reader’s understanding.
The database presented here includes the glossary terms from all current technical reports. The database is searchable by keyword, topic, or by technical report. Each definition provided includes a link to the source technical report within the PDA Technical Report Portal.
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Acceptance Limit
The maximum amount of residue allowed in a product, in an analytical sample, or as an amount per surface area. (TR29)
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Coupon
A small, generally flat portion of a defined material of construction (such as stainless steel or PTFE) and of a defined surface finish, typically used for laboratory cleaning evaluations and/or for laboratory sampling recovery studies. (TR29) (TR49)
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Dirty Hold Time
The time from the end of product manufacturing until the beginning of the cleaning process (also called “soiled hold time”). (TR29)
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Free Drained Equipment
No visible water pool in the equipment or line when viewed under appropriate lighting conditions (but may contain water droplets). (TR29)
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Grouping Strategy
A strategy for establishing similar cleaning processes, usually based on similar products or similar equipment, and to validate the cleaning process based primarily on validation data for a representative of the group. (TR29) (TR49)
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Product Changeover
Procedural steps taken for switching from the manufacturing of one product to another product. (TR29)