In Part 5 of this Limited Series from Particle Measuring Systems, contamination control experts Marc Machauer, Global OEM Business, and Mark Hallworth, Global GMP Specialist, discuss the environmental monitoring data that is generated by Facility Monitoring Systems and how to collect, evaluate, and use that data to make informed decisions. Their discussion includes how system-based data from individual sensors is collected and how to translate that data into meaningful and actionable information about a clean area.