Gather final reagent volumes, stock concentrations, sample IDs, control layout, incubation times, instrument settings, and any deviations from the planned protocol.
2. Separate observation from interpretation
Observation describes what was seen. Interpretation explains what it might mean. Keeping them separate reduces overconfidence and makes troubleshooting more precise.
3. Sort likely causes
Group possible causes into sample, reagent, instrument, and operator categories. This prevents the review from focusing only on the most emotionally obvious mistake.
4. Choose one change
The next run should test a specific idea. Changing many variables at once may produce a better result without explaining why.
5. Preserve the learning
Write the next-step decision into the notebook or shared record. The value of troubleshooting is not only solving one failed run; it is making the next similar run easier.
Review checklist
- Inputs and units checked.
- Controls reviewed.
- Deviations recorded.
- Likely causes grouped.
- Next test defined.