Final answer:
Unexpected meetings, phone calls, procrastination, and interruptions from colleagues are common disruptions to a schedule.
Step-by-step explanation:
The disruptions that usually interrupt a schedule can be classified into four categories: unexpected meetings, phone calls, procrastination, and interruptions from colleagues. Unexpected meetings refer to meetings that are not planned or on the schedule, but suddenly are added, causing a disruption. Phone calls, especially if they are frequent and unrelated to work, can also interrupt a schedule. Procrastination is a common cause of interruptions, where individuals delay or postpone tasks, leading to a lack of productivity. Interruptions from colleagues occur when coworkers seek assistance, ask questions, or engage in casual conversations, diverting attention away from the scheduled tasks.