Oh I dont know... being picky.
Well if that s the case. 
I inspect the carpet/capets, Inform the customer of what results can be achievable. I then test the carpets for colour fastness/ a burn test/water test to distinguish the fibe type. 
I also check type of backing, spills, stains etc.
Move furniture 
I then vacuum with a sebo BS36, Pre-spray, agitate - lite pre spray - let it dwell(Probably have a cup of tea.) while setting up 
Then HWE or choose method of cleaning. 
Wipe skirting
if req after replacing furniture(Place silver film or blocks)
Set up air movers, 
finish up by taking customer around making sure they are happy  putting the kit away and collecting the payment. 
Now I am supprised how many of you never 
pre - vacuumed.  
 
  
  
  
 
Especially you Joe 
 
  
 
Dave