ATPL Human Factors study materials
ATPL Human Factors study resources

ATPL Human Factors (CAA): Decision Making, Judgement and Risk Management

ATPL Human Factors · Work through your exam, one topic at a time.

All guide sections

Decision Making, Judgement and Risk Management

What the domain tests

Decision-making questions ask you to apply a structured model, recognise bias and manage risk explicitly rather than by feel.

Core rules

  • DECIDE: Detect, Estimate, Choose, Identify, Do, Evaluate.
  • Risk is likelihood × severity; use a matrix and set personal minimums before flight.
  • Bias traps: plan continuation, confirmation, anchoring, availability and sunk cost. Outcome bias lets one lucky result validate a poor decision.
  • ORM: identify hazards, assess risk, apply controls and supervise.
  • PAVE covers Pilot, Aircraft, enVironment and External pressures; IMSAFE covers fitness.
  • Good judgement includes rejecting a plan because it 'worked last time'.

Worked example

A VFR flight faces lowering ceilings after 1.5 hours, with a passenger waiting. Sunk-cost and plan-continuation bias push toward continuing. DECIDE reframes: detect the change, estimate the trend and fuel, choose diversion now, identify the alternate, do it, evaluate. The risk matrix rates continued VFR into IMC as high severity and medium likelihood; diversion is low severity.

Traps

Do not treat risk as fixed or purely subjective. Do not equate legal with safe. Do not ignore cumulative risk and external pressure. Do not let a successful outcome validate a bad process.