4.4.4 Process monitoring
The process monitoring of each operating cycle by the automatic controller shall include verification that the process conditions established by the WD manufacturer as necessary and sufficient for disinfection to take place (e. g. disinfectant concentration, temperature and contact time) were attained (see also 5.5).
Microbial testing (e. g. with biological indicators) of the disinfection stage on each cycle shall not be used to meet this requirement.