Clear written instructions affecting the quality of results are known as what?

Clear written instructions that impact the quality of results are referred to as SOPs, or Standard Operating Procedures. These documents are essential in ensuring consistency, accuracy, and reliability in any measurement or testing process, including radon measurement. SOPs provide detailed instructions on how to perform specific tasks, including the methodology, equipment needed, safety precautions, and data handling processes.

By having well-documented procedures, organizations can ensure that all personnel follow the same steps, reducing variability and potential errors in measurements. This helps maintain the integrity of the data collected, which is critical in a field like radon measurement where accurate results are vital for health and safety assessments.

In contrast, while Quality Assurance (QA) and Quality Control (QC) play important roles in ensuring quality, they do not specifically refer to the written instructions themselves. QA refers to the overall process of ensuring quality in services and products, while QC involves the assessment of completed tasks to ensure they meet standards. Work guidelines, while similar, may not be as formal or comprehensive as SOPs and could encompass a broader range of informal instructions.