Audits are site walkthroughs to collect information on your air equipment and the demands of your facility. This is helpful to make sure your equipment is properly suited for the needs of your production. 

-If it is has been several years since your equipment was installed then a more in-depth audit may be helpful to determine if there are any leaks in the system or any other losses in performance. 

-For those who are setting up a new facility then an audit would be useful in determining what equipment and materials you will need.