Functional performance testing of the specified components has been successfully completed.

I would choose option (C) Test inter-relationships between systems and subsystems.

>>>>>>>>>>>>>>>>>>>>>>>>>C>>>>>>>>>>>>>>>>>>>>>>>>

I chose option -------C

Thanks

I agree with the experts that testing the system, the subsystems and the inter- relationships in between is a must.

C. Test inter-relationships between systems and subsystems. 

C) testing and making sure the systems function as planned, than train the personnel and run a live test... meaning the personnel tests it and reports flaws before the system runs in normal mode...

 Test inter-relationships between systems and subsystems.

I would say option B but also would initiate Option C

Dear respected Gentlemen i have a question i am fresh mechanical engineer and i am very much interested to persuade my career towards HVAC , I get an offer in testing and commissioning of HVAC system ! do you think i am on the right direction!

i would be grateful to you all if you could just reply your suggestion and opinions