Customer Service Management involves managing the order entry, fulfillment, and invoicing process to provide a single source of customer information from order placement to delivery. Key aspects include processing orders, managing inventory, customer files, and initiatives. Order taking, entry, processing, invoicing, and accuracy are key performance metrics. The Order to Cash process encompasses all steps from initial order through receiving payment. Reasons for changes include providing a one-stop shop for customer inquiries, streamlining the Order to Cash process, and integrating supply issue management.