In the manufacturing industry, it is normal to have machines break down. Therefore, companies invest in preventive maintenance. The same would be the case if you were working with actual people, who either get sick or go on planned holiday. Sometimes these breakdowns can be foreseen and planned for, but in some cases it cannot. During these unforeseen scenarios, in most cases companies would need to quickly come up with a plan B as to how their new plan would look like.
From an ERP perspective, this would cause a downtime to your resources, leaving you no choice but to either reschedule your operation earlier or later or if possible, reassign it to another resource. This blog post deals with exactly that scenario, and shows you to get to that plan B in a both effective and efficient manner.