Resources & Expertise

Practical guides, analyses and best practices for pharmaceutical cleaning validation teams.

Ring A3P — Regulatory intelligence engine
Tools 7 min

Ring - the regulatory intelligence engine that simplifies your life

The pharma industry drowns in regulatory documentation. Ring (A3P + Aktehom + Mindexia) lets you query 1,700+ life science referentials in plain language. Concrete use cases in cleaning validation.

Evolution of MACO calculation approaches in cleaning validation
MACO calculation 18 min

How to Calculate MACO in Cleaning Validation: The 3 Formulas, Their History and Regulatory Sources

MACO by therapeutic dose, HBEL/PDE or 10 ppm rule: the 3 formulas detailed with regulatory history, worked examples, and why the LD50 approach is prohibited.

Matrix approach
Strategy 5 min

Strengths and limits of the matrix approach

The matrix approach groups similar entities rather than validating each product-equipment combination. Promising, it can also become a source of risk if poorly constructed.

Toxicity scoring worst case
Worst Case 4 min

Another approach for toxicity scoring in the definition of worst-case products

When HBEL values are not available, Occupational Exposure Bands (OEB) offer a quick and consistent alternative for scoring toxicity.

Swabbing vs rinsing
Sampling 6 min

The great debate: swabbing or rinsing?

Direct sampling by swab or indirect by rinsing? The two methods work on different principles and provide distinct information. Full comparison.

Optimizing acceptance criteria
Criteria 3 min

How to optimize acceptance criteria in cleaning validation?

Calculating acceptance thresholds is not that complicated, but several parameters can be adjusted to bring them closer to production reality.

Auditors' expectations
Audit 4 min

Cleaning validation: auditors' expectations and pitfalls to avoid

20 to 30% of deviations noted during GMP inspections concern cleaning validation. What auditors expect and how to avoid classic pitfalls.

Glossary 6 min

Cleaning validation: glossary of key terms (MACO, ARL, LOD, LOQ…)

MACO, ARL, PDE, LOD/LOQ, recovery rate… Each term has important implications for patient safety, regulatory compliance and risk management.

Multi-product acceptance criteria
Criteria 3 min

How to tackle the challenge of acceptance criteria in a multi-product environment

In a multi-product environment, the number of product A in B combinations can explode. Here is how to approach this challenge without losing the regulatory thread.

Documents to know
Documentation 5 min

Cleaning validation: the documents you need to know

Annex 15, FDA 21 CFR Part 211, PDA TR 29 & 49… Do you really know all the documents that govern the validation of cleaning processes?

The worst-case product trap
Worst Case 5 min

The worst-case product trap

The worst-case approach rests on a simple principle: if it works for the hardest, it works for the rest. But in practice, choosing the worst-case product is fraught with pitfalls not to be underestimated.