As I always remind myself:

G’donya Tim It works every time!
Besides techies being supa special bods anyway.
They have the ability to get right the first & every time, without any or little rehearsal’ In fact invariably are able to cover & fix the warm props stuff ups on the run, without the punters being aware of a hiccup!
I remember reading quite a few eons ago, that the University of Queensland I think did a survey of  the average intelligence required to work in theatre.
I can’t remember the number surveyed, how it was conducted, it’s format or questions asked?
But I do remember that the actors beat out for the lowest being performers marginally after administrators, FOH & directors with techies having the highest average followed by cleaners.
You don’t have to take my word for it, remembering it was conducted by the banana benders Uni, but the outcome is consistent with & follows the natural order of things in theatre!

It's been different from show to show.  "Something's Afoot"... I'm running all the effects backstage.  Our CT is doing the show, HS techs in light booth.  "Colonel Gilweather" has the nerve to say "Techs should memorize the entire script".  They only worked with us the last 2 weeks or less of rehearsal.  Plus, our HS techs light community concerts, band, etc.  We've had actors paraphrase like fiends, miss cues, and blame the techs.  "Christmas Carol"... I'm sort of lighting designer with input from the director.  I end up pretty well chained to a followspot while someone else runs the light board.  But very much thanked.  And "Scrooge" was there to work on sets!  I haven't run across many actors deliberately being jerks toward the techs, more like they're oblivious. 

 I finaly found this on another site - which might help?
In explaining the "Theatre Structure'
Producer:
Leaps Tall Buildings In A Single Bound
Is More Powerful Than A Locomotive
Is Faster Than A Speeding Bullet
Walks On Water
Gives Policy To God
Director:
Leaps Short Buildings In A Single Bound
Is More Powerful Than a Tank Engine
Is Just As Fast As A Speeding Bullet
Walks On Water If The Sea Is Calm
Talks With God
Playwright:
Leaps Short Buildings With A Running Start
Is Almost As Powerful As a Tank Engine
Is Faster Than A Speeding BB
Swims Well
Is Occasionally Addressed By God
Actor:
Makes High Marks On The Wall When Trying To Leap Buildings
Is Run Over By Thomas The tank Engine
Can Sometimes Handle A Gun Without Inflicting Self-Injury
Dog Paddles
Talks To Animals
Technicians:
Runs Into Buildings
Recognizes Locomotives Two Out Of Three Times
Is Not Issued Ammunition
Can Stay Afloat With A Life Preserver
Talks To Walls
Chorus:
Falls Over Doorsteps When Trying To Enter Buildings
Are Thomas The Tank Engine & saying "Look At The Choo-Choo!"
Wets Self With A Water Pistol
Plays In Mud Puddles
Mumbles To Self
Stage Manager:
Lifts Buildings And Walks Under Them
Kicks Locomotives Off The Track
Catches Speeding Bullets In Teeth And Eats Them
Freezes Water With A Single Glance
Is GOD!

Having done time on both sides, both as an ac-TOR and a TECH-ie, I firmly believe that EVERY ac-TOR should have to put in some time on the other side so they can truly appreciate everything that goes into pulling off a great show and making THEM look good.  I haven't figured out HOW to pull that off yet, but maybe require anyone who does at least 3 shows or so with your theatre to spend at least one on the other side.  I have yet to meet anyone who "fits" into every show, so spend that one on the flip side and learn something!

That said, I think it is invaluable for anyone who really wants to excel at acting should also spend some time stage managing or assistant directing.  I did a stint as a stage manager on one show and really learned a great deal!  One's perceptions of blocking and stage presence and a number of other factors really changes when you spend the entire show on the other side of the aisle!!