Where do you place 'administration' in a construction company among Planning / HR/ Finance/Marketing. please rate your opinion ( in % out of 100) .

Administration keeps the organization flowing. It's the backbone, if done properly.

I would say95% if it's a good and trustworthy administration. 

Ideally it should be between75-85% provided all support functions takes directions from Admin

I would say85%. An administrations role is very important in any company.

planing & Hr (70-85 % )

An administration department consists of people who are so organized and disciplined that they influence other departments in a way to achieve the desired targets and objectives of the company.

So ideally in any company, Administration plays about80 -90% of the business activities in a month,

day or whatever,