One late Friday afternoon last month, the three-story Whole Foods Market at Union Square in New York City was, as usual, teeming with customers. To accommodate what one shopper called the “insane” ...

In its latest coronavirus safety enhancement, Smart & Final has begun implementing a single-line queuing system at checkout in its stores. Commerce, Calif.-based Smart & Final said plans call for the ...

Retrial queueing systems represent a class of models in which arriving customers, upon encountering a busy or unavailable server, enter a virtual waiting room—commonly referred to as an orbit—to ...