Where should the project department be located?

See if you are a party a or a contractor.

The project department of the construction party will build a board house on site, considering the site layout and not blocking the passage.

Party A's project department is not necessarily located on the construction site, but it is better not to be too far away, because things on the construction site need to be decided by Party A at any time. After all, Party A has the final say.