In September 2024, two laboratories preparing an analytical transfer produced different results from a common set of development samples. The project sponsor wanted the receiving laboratory to repeat its work quickly so the transfer could be reported complete. Our analytical colleagues had not yet established whether the difference arose from sample preparation, instrument execution or the material itself. A repeat without a defined question would add numbers without necessarily adding understanding.
I supported a four-week investigation proposed by the analytical and quality leads. Its CNY 1.2 million cost covered specialist time, planned comparative work and the resulting review. Tinglan Que retained the quality decision; my role was to secure capacity and make the technical question explicit. The original results remained visible. Additional examinations were identified as new work under the investigation plan, not replacements for observations that had become inconvenient.
The comparison used twelve retained development samples, with preparation steps observed jointly by both laboratories. The investigation identified a difference in how one preparation instruction was interpreted. That finding supported clarifying the instruction and undertaking the next agreed transfer work. It did not justify declaring the first results invalid simply because an explanation appeared plausible. The authorised review considered the complete record before deciding the next step.
The receiving laboratory's transfer decision moved by four weeks. The programme could explain the preparation difference and had an agreed, executable instruction; its scheduled milestone was still missed. I rejected a proposed presentation that showed only the later aligned observations. The sponsor's wish for a concise success statement was understandable, but omitting the original difference would have removed the reason the work mattered and made the account less useful to a future laboratory.
My lesson concerns language before it concerns equipment. Next time I would ask the receiving analysts to demonstrate their interpretation of the procedure during planning, before comparative samples are used. A document that both teams have signed can still contain different practical meanings. Making those meanings visible earlier would improve the transfer design without assuming that any future discrepancy has the same cause.