A manufacturing company produces electrical connectors for government projects in one of its facilities. One particular product is a 2-inch diameter round connector that must fit in a specific spot. There is an acceptable tolerance of 0.02 inch. Anything produced outside specifications is considered defective. The line supervisor for this product has data showing that the actual diameter of the finished product is 2.1 inches with a standard deviation of 0.02. What is the current capability index of this process? (Note: You can only show the expression/equation, including the information provided.)