Why do you describe each part of the build as a chapter?

When you receive the plans for the airplane, they are broken into chapters that basically are sub-assemblies of the aircraft. For example: the passenger fuselage is made of a couple sides and a body so that chapter is broken down into building the jigs, building the sides, building the keel and building the bottom. Each of these would be it's own step in that chapter.

Another good thing about this is that as builders, I am able to go to any other builder site, and as long as they organize in this same fashion, per the plan, there is an automatic reference model for me to know right where to go.

If you decide to build, you will find this immediately useful. If all you like to do is read about it, it breaks it up into reasonable and logical sections.