Starbucks is having problems. Again. At this time, customers in California believe they have not enough milk in their latte. IMHO (personal opinion of the author), whatever has been written about Starbucks it’s more popular than all other coffee houses in America put together.
Any American shopping mall is full of coffee establishments, but half the tables there are usually free. Only at Starbucks you may see a line of people from opening morning hours till late at night before closing. It’s coffee culture and “spiritual braces”.
You can only manage what you can measure
Still, there’s actually a real problem remaining. Underfill of milk is the most common complaint of customers at gas stations. You will be surprised how easily it can be solved. Milk actually is poured badly because the coaffee machines aren’t being washed properly.