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When we fly and nothing scary happens, is the system’s design affording this success? Not always — sometimes humans are the cause of success. This resilient performance is often overlooked. We explore two types of resilient performance strategies: countermeasures and modifications. countermeasures are behaviors triggered by variables anticipated to be challenging or problematic (i.e., pressures). To capture this, we look at examples of how a problem was avoided. For example, a country road may have a hairpin turn where accidents more frequently occur. With this pressure identified, we look at successful drivers for insights. Modifications are changes that are created to fill a gap between work-as-imagined and work-as-done. This strategy is from the design of systems. In aviation, work-as-imagined is often explicit, so it can be compared to behaviors using data. These two resilient potentials aim to better understand how systems function, as well as how people contribute to unrecognized successes.