EN ISO 10075-3:2004 PDF

Overview

EN ISO 10075-3:2004 - "Ergonomic principles related to mental workload - Part 3" defines principles and requirements for the measurement and assessment of mental workload and for the measurement instruments used. Published by ISO and adopted by CEN, this part is aimed primarily at ergonomic experts but also provides orientation for employers, designers and occupational-health stakeholders. The standard helps users choose suitable methods, document procedures and improve communication among parties involved in mental-workload assessment.

Key topics and technical requirements

• Scope and purpose

  • Establishes procedural, quantitative and documentation requirements for assessing mental workload.
  • Guides selection and development of measurement instruments without prescribing specific tools.

• Core definitions

  • Terms defined include objectivity, reliability (homogeneity, consistency, stability, inter-rater reliability), validity, sensitivity, diagnosticity, generalizability (relative and absolute) and usability.

• Three-dimensional model of assessment

  • Considers different:
    • Aspects of mental workload (e.g., mental stress, strain, fatigue),
    • Measurement techniques (task analysis, performance metrics, subjective ratings, psychophysiological methods), and
    • Degrees of precision (screening/orienting vs. accurate measurement).

• Requirements covered

  • Procedural requirements: how measurements should be planned and conducted to ensure comparability and interpretability.
  • Quantitative requirements: criteria for precision, stability and sensitivity of instruments.
  • Documentation requirements: mandatory reporting elements so results are reproducible and usable for decision-making.
  • Annexes: additional guidance on generalizability and a checklist for choosing instruments.

Practical applications and users

• Primary users
  • Ergonomists, occupational psychologists, occupational health specialists, physiologists and researchers trained in mental-workload theory and measurement.
• Secondary users
  • Employers, system designers, safety managers, employee representatives and public authorities seeking to understand or commission mental-workload assessments.
• Applications
  • Selecting or evaluating measurement instruments for workplace assessments.
  • Designing studies to compare work conditions or interventions.
  • Informing ergonomic design, workload allocation and occupational-health risk assessments.
  • Supporting evidence-based decisions where mental workload impacts safety, performance or well‑being.

Related standards

• ISO 10075-1: General terms and definitions (mental workload)
• ISO 10075-2: Design principles related to mental workload
• ISO 6385: Ergonomic principles in design of work systems

Keywords: mental workload, ISO 10075-3:2004, ergonomic assessment, measurement instruments, reliability, validity, psychophysiological methods, subjective ratings, usability, occupational health.