Before beginning his project, eddie list and gives a description of all the materials to be used. what is he making?

I would say that Eddie is making an inventory which basically is what do I have on hand ie what specific items and how much of each ie feet of pipe at a certain diameter etc and also what is missing and what will I have to order and what will it cost and what alternate suppliers are there to find the cheapest but best supplier? This is a wise idea for an industrial project so that one ensures one will have all the supplies and equipment necessary, and with the correct specifications.