It is bad to be irresponsible about your work schedule
Tim heading out after work on Friday night after his last server shift of the week.
Tim wants to get his work shift schedule for the following week.
Tim takes a photo of the schedule sheet with the camera on his phone.
Tim looks at the schedule for a few seconds to memorize his shifts.
Tim shows up for all his scheduled shifts for the week.
Tim misses one of his shifts because he forgets part of his schedule.