What is a relative technical 1RM and how do you find it?

New weightlifters (and experienced) are notorious for wanting to reach new PR's for lifts each week.  However, while they may make very quick progress in the beginning, they will always reach a plateau.  Gains become slower and numbers start stalling.  Along with that comes a loss of technical form.  Unfortunately, because these weight lifters want to reach new 1RM's so quickly, they don't take the time to fix their forms/imbalances, nor do they often know how to.  

With athletes this becomes even more of an issue.  They are required to perform at such a high level that numbers are expected to increase regularly.  In some cases it's the make or break for whether they can compete for a starting position.  

So what is a relative technical 1 RM and how do you find it?  What is absolute vs relative 1RM's? 
Below, Justin Thacker MS, RD, LD, CES, USAW, CSCS , owner of The Lab Gym and an accomplished olympic weight lifter, answers these questions.   

Note that Justin really emphasizes "technical proficiency and safe form" with this video. He is spot on with explaining how important keeping proper form is when adding weight for olympic lifts and other compound lifts like the squat and deadlift.