List and describe typical disruptions to the external supply chains

What will be an ideal response?

Typical disruptions include volume changes, product and service mix changes, late deliveries, and underfilled shipments. Volume changes occur when customers change the quantity of the product or service they have ordered for a specific date or unexpectedly demand more of a standard product or service. Product or service mix changes occur when customers change the mix of items in an order and cause a ripple effect throughout the supply chain. Late deliveries of materials or delays in essential services can force a firm to switch its schedule from production of one product model to another. Finally, suppliers that send partial shipments do so because of disruptions at their own plants.