You are a machine learning engineer responsible for optimizing the cost and performance of an ML model deployed on Amazon SageMaker. The model serves real-time predictions for an e-commerce platform, and the current instance type is providing reliable performance but at a higher cost than anticipated. Your goal is to determine the most cost-effective instance type that still meets the performance requirements for low-latency predictions. Which approach is the MOST EFFECTIVE for rightsizing the instance family and size for your SageMaker endpoint?