Keeping the process intact from bench to manufacture
“It works in our lab. Why would it not work when someone else makes it?”
Scale and site change the process in ways a successful small-scale run does not reveal — mixing, heat transfer, hold times, surface area, the operator who knows to wait an extra minute. What transfers is process understanding, and the programmes that transfer badly are the ones that documented outputs rather than reasons.
WHAT THIS IS NOT
Orientation for translating research toward a regulated product — not a determination of device status, regulatory pathway, submission type or clinical adequacy, and not a substitute for qualified regulatory advice. SPEQ is independent: linked institutions, incubators and agencies are third parties, and nothing here implies affiliation, endorsement or partnership with any of them.
ARE YOU HERE?
- You are talking to a contract manufacturer, or planning to make material somewhere other than the bench
- The process lives partly in a document and partly in the person who developed it
- Nobody has established which parameters actually matter, as opposed to which ones were recorded
WHAT TO DECIDE NOW
- Which process parameters are critical to the product and which are simply the values you happened to use
- What "the same" means for your product — the comparability criteria — before you have a reason to want a generous answer
- Whether the developing scientist is available through transfer, which is a resourcing decision with a technical consequence
START KEEPING THESE RECORDS NOW
- Development history with the reasoning: why this buffer, why this temperature, what was tried and rejected. A parameter with no rationale cannot be defended or safely changed.
- Analytical methods and their qualification state, because a transfer measured by an unstable method produces uninterpretable results
- Every deviation and observation from development runs, including the ones that were "just a bad day"
THE PROBLEM THIS ANSWERS
A process moves from the bench to a manufacturing partner carrying its parameters but not the reasoning that set them, so the receiving unit cannot tell which parameters are constraints and which are habits.
What it costs: The receiving unit either preserves everything, making the process unimprovable, or changes something load-bearing without knowing it was load-bearing.
NOT YET MEASURED — Transfer-shaped queries arriving on the startup guide rather than on the topic explainer.
WHERE THIS GOES WRONG
- Transferring a batch record without the understanding behind it. The receiving site can follow it exactly and still produce something different.
- Discovering at transfer that the analytical method was never validated. The transfer then cannot be assessed, because nothing measures it reliably.
- Treating the contract manufacturer as the owner of the process. Oversight of an outsourced activity stays with you, and so does the deviation.
WHAT THIS DOES NOT ANSWER
- Whether a comparability exercise or a bridging study is required, which depends on product type and how much the process moved
- Which activities the quality agreement should assign to which party, which is negotiated rather than derived
OFFICIAL SOURCES · INDEPENDENT THIRD PARTIES
Where technology transfer sits in the product lifecycle, and what knowledge management is expected to carry across it.
FDA — Contract Manufacturing Arrangements for Drugs: Quality Agreements ↗What a quality agreement should assign, and the agency’s expectation that the owner retains oversight.
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