Activity-based costing (ABC) measures the costs of each activity within a production function. It identifies the cost drivers for each activity and uses them to calculate separate allocation rates. ABC can be an effective tool for managing costs. In this context, respond to the following: What are the refinements that have been made to enhance the efficiency and effectiveness of ABC in managing costs? Why do you think ABC costing is more or less efficient than job order costing? Please provide an example.