You shouldn't expect someone to work when they're not scheduled.
Jaime manages a small retail store where she is in charge of making the schedule for her employees, Beth, Crystal, and Sarah.
Jaime wants Sarah to work a shift with Beth and Crystal on Thursday.
Jaime adds all of her employees to Thusday's schedule and tells them of it beforehand.
Jaime puts only Beth and Crystal on for Thursday's schedule, and reprimands Sarah when she doesn’t show up.
All of the girls show up on time, and Jaime's store runs smoothly.
Hurt by Jaime's words, Sarah quits and Jaime is short-staffed.