The tribunal is an independent quasi-judicial body. It reports to the House through the Minister of Finance. There's an adversarial process. On one side you'll have Public Works or some other department, and on the other hand you'll have the agency or the company that's complaining about the process.
I've not heard any complaints about our impartiality. Indeed, most of the time the complaint comes the other way, that we're too hard on Public Works or individual departments.