Slowly, but hurry, is my take.

Quality vs quantity of course depends on the nature of work. If you are employee and all the working infrastructure is ready there to be used, you can "just" focus on doing something, what ever it is. If you are employer, you can't "just" even go to the work, because you have to use unpredicted amount of time to figure out what you even need to do or have and why.

Whether you are employee or employer, make sure you feel the practical progress, that is, e.g. once a week you can have status session, where you can show that now you have something that you didn't have at last session, and that it is important step for the end goal.