DB - feel free
Another description is 'Handrails, not Handcuffs' for SOPs - maybe more akin to the Pirate Code (more guidance than a code)
KJ - you have SOPs and try to adhere to them for safety's sake - sometimes you are presented with a situation way outside the 'Standard' - then you have to use your judgement - that is where it often goes horribly wrong because peoples' judgement is often impaired by many perceived pressures - the classic red mist, pressonitis or target fixation for example.