Best way to measure customer satisfaction for last-mile delivery?

NPS alone misses a lot for last-mile because it lumps everything together — try adding a short post-delivery microsurvey (3-5 questions max) triggered right after confirmation, asking specifically about communication, timing accuracy, and condition of package. Tools like Delighted or even a simple Typeform can do this cheaply. The timing matters a lot — catch people within 2 hours of delivery and response quality jumps significantly.