arpadveress 
One question: have you ever been part of the follow up of any industrial incident?
Does it make sense to have an approved, validated industrial site by a responsible 3rd party and in that case you only need to confirm the operation and/or variation to it?
Aspects of validation may be fire, work, enviromental and explosion safety including safe being of electrical / non.electrical systems working as one.
We all know it makes sense. Even if we are not there for incidents it might happen. In that case to deliver proof of evidence focusing onto variation to existing if any makes the life easier and not to prove that there was a system…
Keep up good work!
