Is room treatment a science?


What dictates room treatment?  
Many options are available but trial and error can be pricey. I'm a happy tweeker  seeking knowledge and experiences.
Thank You for your thoughts. Long live HiFi !
tomavodka
Yes room treatment is an actual science, if you look at recoding and mixing studios you will see.   But it is very straightforward and pretty easy to do. 
As stated above, GIK can be a good resource if you need a consult and product.  If you have an idea on what you need, Audiomute is another good and affordable product line.  If cost is an issue, most all of this can be a DIY project.  Don't over do it, stick with some fundamentally accepted treatment suggestions to start and go from there.  Good luck in tuning your room.

The above suggestions have schooled me. Your explanations have been tangible and easy for me to understand.

Thank You!
Another vote for GIK Acoustics and their invaluable advise. They have wide variety of Acoustic panels, basic panels are inexpensive and well made. IMO, they far outweighs the DIY panels. I did my room in two phases and couldn’t be any happier with the results.

As others have pointed out, start with basics and then add more later, if needed.

Mr Squires nailed it.   "I will say after lots of measurement and experimentation that treating your room well is never a mistake." 

Room is part of the system. For me the largest and most revealing improvement in SQ came from treating the room.