Abstract
The paper introduces a conceptual framework that could improve the safety performance measurement process and ultimately the aviation system safety performance. The framework provides an implementation guide on how organisations could design and develop a proactive, measurement tool for assessing and measuring the Acceptable Level of Safety Performance (ALoSP) at sigma (σ) level, a statistical measurement unit. In fact, the methodology adapts and combines quality management tools, a leading indicators programme and Lean-Six Sigma methodology to formally measure and continuously improve a stable and in-control safety management process by reducing safety defects and variability from core organisational processes and objectives. The implementation guide was empirically tested and validated with data collected and analysed within a period of nine months by the safety department of a complex aviation organisation operating a large transport aircraft fleet.
Highlights
At European level, the European Aviation Safety Agency (EASA, 2014), in parallel to management system requirements, outlined its new harmonised approach for establishing a Performance-Based Environment by introducing a clear set of indicators and targets against which the oversight performance of civil aviation authorities is assessed
What methodology could proactively measure system safety performance and improve the safety performance measurement process?
The actual process performance has been increased by 0.52% The σ level has been increased by 43%, The Defects per Million Opportunities (DPMO) have been reduced by -84577
Summary
At European level, the European Aviation Safety Agency (EASA, 2014), in parallel to management system requirements, outlined its new harmonised approach for establishing a Performance-Based Environment by introducing a clear set of indicators and targets against which the oversight performance of civil aviation authorities is assessed. ICAO and EASA do not provide a clear guidance on how stakeholders could measure safety performance. In aviation industry there is a level of uncertainty as to what extent existing methodologies for measuring performance are suitable for those operators who have achieved excellent safety records and in-control processes and as such look for further improvements
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