Plan a relevant challenge
VanTsteri’s technical article describes placing biological indicators at selected locations to evaluate a VHP treatment cycle. The challenge organism, population, resistance and exposure conditions are part of the interpretation.
Read the result within its scope
The source describes recovering and culturing indicators after treatment. An indicator result concerns the specified challenge and location; the nominal population of an indicator alone is not a measured log reduction across the whole facility.
Combine performance and suitability checks
The article also discusses usability, material compatibility, treatment distribution and residual-control considerations. These need project-specific evaluation. The source is an explanation of validation practices rather than a report of a single completed customer project.