Outcome
A master overview plus a per-site diagram set — and three bugs fixed in the open-source tool along the way.
The problem
Layered auto attendants, clinic queues, holiday routing and overflow paths. The existing tool produced one giant, tangled diagram nobody could read — and it needed broad Graph consent to run.
What I did
- Forked the visualiser to run on the Teams PowerShell module alone, removing the Graph dependency and its recurring admin-consent prompt.
- Fixed three bugs: node IDs starting with a digit broke rendering, orphaned overflow targets crashed the run, and an empty-array comparison threw.
- Split the output so every auto attendant and queue gets its own diagram with previous/next links, and factored shared paths (overflow, after-hours) into single-source files.
- Kept the default layout engine because the alternative broke chronological reading order, and used invisible edges to control sibling order.
Result
The customer received a master call-flow overview that names every detailed PDF, plus one document set per site — something their team can actually read and maintain.