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

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