The family and future sections, written while they are still hypothetical.
A route, not a gate
A route is a named list of modules with something written down at the end of it. Nothing in a route locks anything, and you can take the steps out of order.
Why a route rather than a list
Thirty-two modules is a lot to look at when you do not yet know which of them you need. A route is somebody having already answered that: these ones, in this order, because the earlier ones give the later ones something to work from. The Structural Report is easier to write an agreement from than a blank page, and it needs two finished Soundings before it exists at all.
What it does not do
It does not lock anything, and it is not a course. Nothing is withheld until you finish a step, there is no schedule, and stopping halfway costs you nothing — what you wrote stays written and the modules stay open. Where a module genuinely needs both of you, that module is what waits, exactly as it would if you had opened it on your own.
What it never shows either of you
A route shows where each of you has got to and nothing else. It does not record how long anything took, or how long the other one has left something undone. Elapsed time is not a number this product prints about a person.