The Supply-Chain Operations Reference-model (SCOR) is a process reference model that provides a comprehensive framework for evaluating and improving supply chain performance. It includes best practices for various supply chain processes such as plan, source, make, deliver, return, and enable. In this context, the production and engineering departments using SCOR best practices to design a new "make" process flow is a correct application of the model. The "make" process in SCOR focuses on production activities, and leveraging SCOR's best practices helps in designing efficient and effective production processes.
References
* Supply Chain Council. (2012). Supply Chain Operations Reference Model (SCOR) Version 11.0.
Supply Chain Council, Inc.
* Bolstorff, P., & Rosenbaum, R. (2007). Supply Chain Excellence: A Handbook for Dramatic Improvement Using the SCOR Model. AMACOM.

Vendor-managed inventory (VMI) is a supply chain initiative where the supplier is responsible for managing and replenishing inventory based on real-time demand and inventory levels at the customer's location. By implementing a VMI program, companies can reduce inventory carrying costs in several ways:
* Improved Inventory Accuracy: Suppliers monitor inventory levels and ensure timely replenishment, reducing the likelihood of overstocking or stockouts.
* Reduced Safety Stock: With better visibility and coordination, the need for high safety stock levels is diminished.
* Enhanced Supply Chain Efficiency: Suppliers can optimize their production and delivery schedules based on actual demand, leading to more efficient use of resources and lower overall inventory levels.
* Lower Administrative Costs: The automated process reduces the administrative burden associated with inventory management.
References:
* Waller, M., Johnson, M. E., & Davis, T. (1999). "Vendor-Managed Inventory in the Retail Supply Chain." Journal of Business Logistics, 20(1), 183-203.
* Disney, S. M., & Towill, D. R. (2003). "Vendor-managed inventory and bullwhip reduction in a two-level supply chain." International Journal of Operations & Production Management, 23(6), 625-651.

The correct answer is C. Percent of unplanned orders that can be shipped within the same week.
Supply chain flexibility refers to the ability of a supply chain to adapt to changes in demand or supply. The percent of unplanned orders that can be shipped within the same week is a good performance measurement for supply chain flexibility because it shows how quickly the supply chain can respond to unexpected changes in demand. If a high percentage of unplanned orders can be shipped within the same week, it indicates that the supply chain is able to quickly adjust to changes in demand and is therefore flexible.
Option A, total days of inventory in supply goods, is a measure of inventory management, not supply chain flexibility.
Option B, customer order fill rate greater than 90 percent, is a measure of customer service level, not supply chain flexibility.
Option D, reduction in order fulfillment lead time in a given period, is a measure of efficiency, not supply chain flexibility.