How to identify bottlenecks when a restaurant kitchen is slow to serve food?

When a restaurant is slow to serve food, don't just urge the chefs to hurry up. First, check whether the delay is in food prep, hot kitchen, plating, food running, or front-of-house calling. If the prep volume before peak hours is insufficient, every subsequent order will require last-minute chopping and preparation; a menu that is too scattered can also overwhelm a single station. I would time…