Test a written route network when a segment is unavailable

Two routes can have different names and still depend on the same connection. Before treating them as alternatives, write their actual sequences and test a small diagram with one segment unavailable. This exercise concerns an invented planning network; it does not change a virtual office or establish that a proposed route is traversable in Kiguri.
State the destinations and connection assumptions
Use a fictional paper diagram with destinations E, A, B, J, and M. Its connections are E-A, A-J, E-B, B-J, and J-M. For this exercise, every listed connection works in both directions. Keep that assumption visible rather than allowing different readers to interpret a line differently.
Give the diagram a bounded purpose: can someone go from E to M under the stated connections? Record any real-map correspondence as unverified until someone has checked it with the appropriate access. A line drawn between destinations does not supply a passage, a portal, or permission to use one.
Write the connection sequence for each route
The first route is E-A-J-M. The second is E-B-J-M. Write both sequences in a route register and list the individual connections they use. Compare the sequences, not just the route labels or the names of the intermediate destinations.
Both routes require J-M. Calling one the A route and the other the B route hides that shared dependency. The routes differ before J, but their final connection is the same. If the required journey is in the reverse direction, trace that sequence too; it works in this toy network because bidirectional connections were explicitly assumed.
Remove one segment in a copy
Make a separate copy of the diagram and mark A-J unavailable. E-A-J-M no longer works, but E-B-J-M still reaches M. Record the remaining complete sequence rather than saying an alternative probably exists.
Restore the original diagram, then make J-M unavailable instead. Neither listed route reaches M. Do not combine separate removals silently or describe the two outcomes as the same test. The register should name the unavailable segment, the attempted origin and destination, and the route found or the lack of one under the listed links.
Examine a proposed independent connection
A designer might propose B-M. Add it only to another explicitly hypothetical copy. With B-M present and J-M unavailable, E-B-M reaches the destination. That shows how this particular added connection changes the diagram's result.
It does not prove a real layout can support the connection. Ask what passage, access, and destination behavior would need checking before adopting it. Keep the original proposed network and the additional-link version separate so a reader cannot mistake a design idea for an already available route.
Preserve reachability and uncertainty together
Finish with the origin/destination pair, connection assumptions, normal sequences, each removal, and its result. Ask another reader to trace the shared-segment case without help. If they merely point to two route names, the common dependency remains obscured.
An unavailable segment in this exercise is a planning condition, not an instruction to close a real area. No emergency or physical-building safety conclusion follows. The useful outcome is a precise answer about the written network and a clearly identified real-map check that the diagram alone cannot perform.
