Investments in the electric grid have long focused on improving the reliability of the system to meet the needs of existing and new customers. Customers expect reliable electricity service, but understand the need to suspend that expectation in extreme weather events. Though not ideal, people have grown to realize that high winds can wreak havoc upon exposed power lines, as one example. Having multiple, redundant paths to serve the end customers, or for end-use loads to be served by a plethora of potential sources, is a solution that improves reliability, but it also ultimately improves the resilience of the system. Reliability and resilience are linked and the definitions of each are often reliant upon the other. This webinar will present a summary of modern thinking on the linkage between reliability and resilience before introducing a metric to define system resilience building up from each customer.