Stand at the workstation, tap Start, and tap Next step each time the work moves on. Mark the steps where people wait or fix mistakes. Time the same task up to three times, with another person or on another shift, and see which step takes the time and which one nobody does the same way.
Yours to keep Bookmark it or add it to your home screen. Prefer a clipboard? Print the paper sheet →
Where do steps like this hide, and what does removing one look like? Read: Doing it by hand for years, until someone decided not to → Measured it? Check if it is worth automating →