Which of the following is NOT a recommended practice to ensure quality control measures are done correctly?

The recommendation to change testing procedures frequently is often seen as counterproductive to ensuring quality control measures. Quality control relies on consistency and reliability in testing methods to accurately assess the presence of radon and make informed decisions regarding mitigation. Frequent changes can introduce variability that may lead to inaccuracies or misunderstandings of results.

In contrast, keeping records, assigning duties and responsibilities, and implementing guidelines that automatically catch irregularities are all essential practices that help maintain a stable quality control environment. They support tracking progress, clarifying team roles, and quickly detecting issues, respectively. Maintaining consistent testing procedures is fundamental to ensuring that quality control measures can be effectively monitored and evaluated over time.