OBJECTIVE: Test whether a fictional service display preserves the meaning of estimated and confirmed information. Use paper screens or an authorized isolated test environment. Do not alter real appointments or send simulated instructions to actual users.
1. Define the Claims
Create a synthetic assistance request. Define three separate fields: estimated service time, assignment status and next information update. A forecast alone must not set assignment status to confirmed.
For this exercise, issue a forecast at 10:00 estimating service at 10:08. At 10:04, replace it with a forecast estimating service at 10:12. These are invented fixtures, not predictions from a validated model.
2. Inspect the Revision
Compare the two screens and any notification. A reader should be able to distinguish the new estimate from a confirmed booking and identify that the expected time changed.
Check whether a remaining-time display merely says eight minutes on both screens. Such a display needs context to avoid concealing the changed forecast. Preserve the original request time separately; updating an estimate must not restart the recorded wait.
3. Withdraw an Unsupported Estimate
At 10:06, introduce a fictional lift interruption for which the model supplies no usable service estimate. Define the next information update as 10:10.
The interface should not label 10:10 as the service time. It should distinguish an unknown service estimate from the checkpoint for another update. Inspect exported and accessibility text as well as the visible panel.
4. Confirm Through an Explicit Event
At 10:11, record an authorized fictional dispatcher accepting the assignment and confirming assistance at 10:15. Check that the confirmed label follows this event, not the earlier forecast or update checkpoint.
Completion criterion: revisions remain understandable, the original wait is preserved, unknown estimates stay unknown, and a confirmation has an explicit supporting event. This tests communication behavior, not the accuracy of a forecasting system.
Read An Estimate Is Not a Commitment and the fictional Promise in the Estimate for context.