Final answer:
A net-change MRP system is updated whenever a relevant event occurs, not just periodically, and updates can happen more frequently than once a week, so the statement is false.
Step-by-step explanation:
The statement that a net-change MRP (Material Requirements Planning) system is one that is updated periodically but not less frequently than once a week is False. A net-change MRP system updates the plans for all items whenever any event occurs that necessitates a change, such as a receipt or cancellation of an order. Instead of updating every item's plan periodically, a net-change system only updates items that have experienced a demand or supply change since the last update. This can happen more frequently than once a week, sometimes even daily or on a real-time basis, depending on the responsiveness required by the business and its MRP system capabilities.