- Working around an occupied, operating property
- Rekeying doors in a planned sequence so a business keeps operating throughout, rather than all at once, takes coordination with the owner's schedule. Properties that need this staged approach, with interim arrangements for doors mid-conversion, add planning time beyond a straightforward, all-at-once installation.
- Collecting and retiring old keys
- Gathering up old keys that are being replaced, confirming they no longer operate any cylinder, and retiring them from circulation is a small additional step some businesses want included, separate from the core design and cutting work.
- Compatibility of existing hardware
- Cylinders that can join the new hierarchy without modification keep the project smaller. Hardware that is mismatched, worn or built on an incompatible keyway needs replacing to fit cleanly into the plan, and that replacement hardware is a separate line from the design and pinning work.