“The check for plausible values for measurements and their associated units is looking for biologically implausible values, not normal values. These were devised based on expert review of three physicians. It is considered a fail because we have tried to steer clear of additional levels of check failures like warnings because we have found that the more levels that are introduced, the easier it is to start ignoring the notification (alarm fatigue). If you have reviewed your data and find that the percent of records that fail the check is acceptable to you, I would recommend altering the threshold so that it is no longer considered a failure.”
Check out the full post here
Also, this other post states future DQD checks may based on data within the network instead of expert review.