Open to participation from any laboratory. Predefined increasing cost over a number of years (typically, but not limited to, 5 years). Set number of distributions per financial year. Primary aim of this phase is to further optimise the programme (sample matrix and trial process) and wider ascertain the quality of testing performed in the given area. Identification of problematic testing aspects informs development of a performance monitoring system proposal in preparation for accreditation.
Previously known as ‘pilot’.