 Developing Safety Performance Targets and Monitoring Plans  Section 4  4.1  Developing Safety Performance Targets  Safety performance targets  are measurable goals used to verify the predicted residual risk of  a hazard. A safety performance target is the preferred means to relate the performance of risk  reduction efforts to the expected risk level. The safety performance target is included as part of  the monitoring plan (see  Section 4.2). Safety performance targets are used to assess safety performance with respect to controls and  newly implemented safety requirements. Do not define the worst credible effect or effects  producing the highest risk level as the safety performance target; instead, look at the less  severe effects or indicators (e.g., the number of unauthorized vehicle deviations on taxiways per  a specific number of airport operations over a period of time). Safety performance targets  should be related to the hazard or National Airspace System (NAS) change.  When developing safety performance targets, use subject matter expertise to determine the  appropriate metrics to monitor. The sources of data used when preparing to assess the NAS  change must be evaluated when developing safety performance targets. If there is no  established data source to support a proposed safety performance target, a means to begin  collecting this data should be identified and documented. The pre–Safety Risk Management  panel data analysis also serves as the basis for comparison against the post-implementation  metrics.  Mapping a hazard to a specific safety performance target may not be possible in terms of  establishing a causal relationship. In such cases, identify a sound alternate method to verify the  predicted residual risk and determine whether controls and/or safety requirements are  appropriate and are functioning as intended. 57 4.1_SMSM_201904  Originally published April 2019  Uncontrolled copy when downloaded