This document outlines a guideline for creating a comprehensive Cleanroom User Requirements Specification (URS). A well-defined URS is critical for ensuring that cleanrooms are engineered to meet the specific needs of their intended purposes. It serves as a blueprint for the design, installation and validation of cleanroom facilities. Primary ele

Cleanrooms are meticulously controlled environments that minimize the presence of airborne contaminants. To ensure a consistent level of cleanliness, cleanrooms are classified according to international standards such as ISO 14644 and US Federal Standard 209E. These classifications define the maximum allowable particle concentration per cubic meter