I just read a fascinating piece about a New York restaurant, whose owners couldn't understand why they kept getting such bad online reviews. The food wasn't a problem, but clearly the service was - how long it was taking, wait times for tables etc. But as they'd recently shortened the menu and employed more staff, it just didn’t add up. To help them understand what was happening, they watched some 10-year-old CCTV tapes, and compared [...]