Imagine a parts seller in Atalar offering a replacement cover for two similar machines. It fits the A12 machine from revision 02 onwards and also fits the A14. A buyer with an early A12 could recognise the product photo and order the wrong part. Give the buyer a way to make the decision using the label on the machine.
Show where to find the full identifier
Use a picture of a sample label with the model and revision clearly marked, and repeat both fields in text. Show that A12 and 02 are separate fields. Keep the compatibility section close to the buying options so customers can check the part before selecting a quantity.
Give a separate answer for each test label
Try four labels: A12 revision 01, A12 revision 02, A14 and an A12 with an unreadable revision. The first combination is excluded and the second fits. If every documented A14 revision fits, say so. For the unreadable revision, show the next step for checking the machine and say what information the parts team can use.
Check the result after changing models
Choose A14 and then switch to A12 revision 01 on a phone. Check that the screen immediately reflects the second choice and that any earlier fit confirmation is cleared. If the store allows a customer to continue with an unknown revision, show that status again at the point where the customer reviews their order.
Trace a correction through the catalogue
In the test catalogue, remove support for one revision and record where the revised information came from. Check the affected product page, search result and any print sheet that lists compatibility. Ask a second editor to repeat the test with the four original labels before publishing the change.
Checklist before publishing
- Model and revision shown as distinct fields
- Supported, excluded and unknown cases tested
- Changing the selection clears the previous result
- Catalogue and downloadable information agree