Question

when is it acceptable to use a personnel platform to raise and lower workers? other means of access would take too long other means of access would be more dangerous or impossible the platform would allow employees and materials to travel together the platform has already been attached to the crane at the start of the day

Explanation:

Personnel platforms are used when other access methods are dangerous or impossible. Safety is a key factor in construction (Construction Project Management sub - field). Taking too long (first option) is not a valid safety - based reason. Allowing employees and materials to travel together (third option) is a misuse (personnel platforms are for workers). Just having it attached (fourth option) is not a valid operational reason.

Answer:

Other means of access would be more dangerous or impossible.