Part 1: the task analysis process. Part 2: task analysis techniques; task data collection; task description methods; task simulation methods; task behaviour assessment methods; task requirements; evaluation methods. Part 3: task analysis case studies; balancing automation and human action through task analysis; a preliminary communications system assessment; a plant local panel review; a staffing assessment for a local control room; task simulation to predict operator workload in a command systenm; task analysis of operator safety actions; maintenance training; a method for quantifying ultrasonic inspection effectiveness; operational safety review of a solid waste storage plant; a task analysis programme for a large nuclear chemical plant.