A local change is rarely local. Ask what else it touches before you say yes.
Your first question is never yes or no. It's: what else does this affect?
| Change requested | The question you ask first |
|---|---|
| Equipment position moved | Does this force changes upstream or downstream too? |
| Conveyor model substituted | Does it match the speed range, weight capacity, zone length, and roller centers the product needs? |
| Sensor relocated | Does the new position still give correct detection for the PLC delay? |
| Setpoint adjusted at startup | Was the speed set to a throughput target? What happens to rate if it moves? |
| Safety device relocated | Does it still give required coverage, and can operators still reach the pull-cord? |
A field markup of what changed. Collect at every visit, not at the end.
Was the change within design intent? Evaluate before it's captured.
The drawing updated to what got built. A legal document the next engineer designs from.