Choosing a CDMO for clinical supply: a practical diligence checklist

A facility tour can impress — clean rooms, polished presentations, and confident project managers. What separates a workable clinical partnership from a painful one is usually invisible on a walkthrough: how decisions are made under pressure, how deviations are investigated, and how knowledge transfers from client to site without losing intent. Diligence should stress those systems, not just capacity calendars.

Start with scope and fit

Before comparing quotes, align internally on batch sizes, dosage form complexity, containment needs, and analytical expectations. A CDMO that excels at large-scale commercial lines may be the wrong economics for early clinical material — and vice versa. Fit includes geography, regulatory inspection history relevant to your markets, and whether the program will share equipment or campaigns with incompatible products.

Checklist: questions that reveal execution risk

• Governance: Who owns tech transfer milestones, and how are slippages escalated between sponsor and site leadership?
• Quality culture: Can the site provide examples of recent CAPAs and how recurring issues were addressed — not to pass judgment, but to assess rigor.
• Analytical alignment: Will release and stability testing be conducted on-site or through a network, and how are discrepancies between methods reconciled?
• Change management: How are post-transfer process changes documented and communicated so comparability remains defensible?

The contract is where incentives become explicit. If milestones, data rights, and decision timelines are fuzzy, the relationship will strain the first time a batch is at risk.

After selection

Diligence does not end at award. Successful sponsors treat oversight as a discipline: regular operational reviews, joint risk registers, and clear definitions of ready-for-PPQ or registration-enabling runs. Verta routinely supports CDMO selection, contract strategy, and ongoing program management for clinical and commercial programs worldwide.

For help structuring your next partnership or recovering a challenged transfer, contact Verta or review our CDMO selection and management capabilities.