I believe that's what Mr. Fast was saying earlier, which is that those two should go concurrently. He is absolutely right. You might not be able to get the witnesses on a certain day, so that day you can move forward with the other one.
Evidence of meeting #5 for Environment and Sustainable Development in the 42nd Parliament, 1st session. (The original version is on Parliament’s site, as are the minutes.) The winning word was going.
A recording is available from Parliament.