Multiple choice What is not a function of a manufacturing execution system (MES)? Send an invoice for the product. Plan when to make the product. Know how to make a product. Register how and when the product was made. Reveal answer Fill a bubble to check yourself A Correct answer Explanation A Manufacturing Execution System (MES) is focused on the production floor operations, such as planning, tracking, and recording production. Sending invoices is typically a function of an ERP system, not an MES.