Stage setup before changing the routine
Use this order: inspect the underside, mock up the final hand height, check knees through the full chair movement, then drill only with confirmed screw depth. Complete the first setup while there is time to read, observe, and reverse decisions. Add one device, user, animal, automation, accessory, or workflow step at a time so the cause of a failure remains visible.
Put desk underside thickness and structure and track length and knee clearance into the setup checklist
Verify desk underside thickness and structure and track length and knee clearance for the selected under-desk keyboard trays in the real environment and record the result. The routine should not depend on remembering a hidden app state, unsupported adapter, special handling step, or unlabelled configuration that another household member cannot recover.
Design daily use around tray width for keyboard and mouse and height, tilt, swivel, and retraction range
For under-desk keyboard trays, write the few actions that should occur every day or week around tray width for keyboard and mouse and height, tilt, swivel, and retraction range. Include cleaning, charging, refilling, data review, physical inspection, or supervision where relevant. If those actions are harder than the previous height-adjustable desks routine, the new product has not removed the original friction.
Test recovery deliberately
For under-desk keyboard trays, safely simulate the most plausible ordinary failure created by the ownership path: loss of power, video, USB, network, driver support, saved settings, a consumable, or an adjustable part. Confirm the relevant alerts, manual controls, saved settings, physical checks, and exact steps needed to resume the routine without creating a second problem.
Review after a normal week
Compare time saved, new chores, reliability, user or animal response, and maintenance. Revert when the desk is glass or structurally unsuitable, the tray narrows mouse room, or lowering the entire desk provides a cleaner posture. Keep the workflow only if it solves the original job and remains understandable to the people who must use and recover it.