When in retail IT I created a script that improved the daily polling processes from hundreds of retail stores to the central system. All I did was make it more resilient to error conditions, and re-poll any error’d stores once.
Before: I’d start work and manually fix ~30% of sites which didn’t poll properly
After: I’d fix the one or two, usually their link had been down for a while or was still down and I couldn’t get the data anyway. it saved around 60-90 min a day