The drawings progress. The commissioning answer doesn’t.
The project manager needs to know how critical power, cooling and controls will work together during commissioning. Each design discipline considers its information sufficiently developed.
A question about cooling during a power changeover keeps passing between disciplines. Each sees the decision as outside its responsibility.
The drawings progress while commissioning waits for an answer. Resolving the uncertainty requires the disciplines to examine their assumptions together, rather than defend separate accounts of completion.

