Dear Khun Harith,
First of all I have to recognize it is definitely our engineer's and sub-contractor's fault not to be fully ready before PTT&Bll's representatives reached AN4 to witness insulation test on 3rd June, and it is definitely our enginner's fault to leave the test site of AN4 without any information to PTT&Bll's representatives on 4th June, both issues not only delayed progress, but also wasted PTT/Bll's resource, I appologize for any inconvinence caused.
I already learned those lessons, I will enhance pre-confirmation to RFI and will try my best to instruct sub-contractors to prepare for test and to attend test as much as possibl