the performance, as described by a collection of defined indicators, in a given set of years. This performance may be the planned baseline performance (incorporating planned improvements), the measured baseline performance (based on historical data) or a projected baseline performance (without planned improvements, sometimes referred to as a “do-nothing” scenario). The projected baseline performance is expected to be used when analysing the need for planned improvements.
ICAO (2009) doc. 9883, Manual on Global Performance of the Air Navigation System
Lexicon Release 2015.2