The tool should reduce reconstruction

I use a tool when it makes the next question easier to answer. A stored measurement should identify the record it belongs to and make its units clear without forcing me to remember the screen where I entered it.

Keep input, output, and limits together

Calculators and analysis views are most useful when they show what was entered, what was calculated, and what the result does not prove. That is why tooltips, saved inputs, and source notes matter.

• Check units before comparing values
• Keep source data with calculated summaries
• Review warnings instead of overriding them
• Use manual correction when an image detector is uncertain
• Treat a result as a record, not a substitute for published guidance

Make the next action clear

The end of a useful workflow is a short next step: save the batch, repeat the test, review the target, or stop and verify. The application should make that step visible without making the work feel heavier.