Why is maintaining and evaluating your random drug testing program important?

From the DOT Publication Best Practices for Random Drug and Alcohol Testing.

It is best practice for an employer to document every step of the random testing process. This includes the numbers, names drawn, dates and times of notification, dates and times of collections, and why a selected employee was not tested during a selection cycle. If unsure, document it!

Best Practices:

• Service agents and C/TPAs providing random selection and testing services to employers must monitor random tests regularly (daily or weekly). They should compare completed tests to the selected ones. If a random test does not occur within the acceptable timeframe (a day or week) of the expected test date, the service agent or C/TPA must contact the employer. They should then take necessary steps to ensure the test completes within the selection period.
• Employers, service agents, and C/TPAs must not wait until the end of the selection period to reconcile random testing numbers. This weak business practice should be avoided. Remember: Maintain all testing records in line with industry regulations. For more information, see the document, “Employer Record Keeping Requirements for Drug and Alcohol Testing Information.”