From PANS OPS 8186 Vol 1.
Instrument Flight Procedure Design parameters dictate that for flight technical tolerances in a missed approach a pilot reaction time of 0 to +3 seconds from the MAPt before the start of climb.
The 'up to 3 seconds' of reaction time is assumed during the 'initial missed approach' segment (see above). From the start of climb the intermediate is commenced and this is where the 2.5% minimum approach climb gradient is commenced.
c) wind: where statistical data are available, a maximum 95 per cent probability on an omnidirectional basis is used. Where no data are available, omnidirectional wind of 56 km/h (30 kt) is used; and
d) flight technical tolerances:
1) pilot reaction time: 0 to +3 s; and
2) bank establishment time: 0 to +3 s.