ISO 18497-4:2024

Overview

ISO 18497-4:2024 - part of the ISO 18497 series - defines verification methods and validation principles for agricultural machinery and tractors that incorporate partially automated, semi‑autonomous and autonomous functions. The standard guides how to verify and validate protective and risk‑reduction measures for significant hazards when machines are used as intended or under reasonably foreseeable misuse. It is intended to support development of machine‑specific (type‑C) safety standards and complements the design guidance in ISO 18497‑1/2/3.

Key points

• Focus: verification and validation for automated functions in agricultural machinery and tractors.
• Applies only where risk assessment identifies significant hazards; does not apply to forestry, public road operations, or machines put into use before publication.
• Provides informative annexes with test/simulation input data (physical object/human properties, environmental influences, test objects, example procedures).

Key Topics and Requirements

• Verification methods (minimum set):
  • Inspection / observation - visual or audible checks.
  • Measurement - physical parameter checks against specified limits.
  • Test - functional (including fault‑injection), cyclic (endurance) and performance tests (e.g., braking, steering, detection).
  • Simulation - virtual evaluation of perception, control and system behaviour under expected environmental and operational stresses.
  • Analysis - FMEA, FTA, reliability/Markov models and formal design review to assess results from other methods.
• Validation principles: high‑level principles for demonstrating systems meet safety objectives (applied to protective measures and system behaviour); these are to be used alongside machine design principles in ISO 18497‑1.
• Emphasis on evidence collection and objective data to demonstrate acceptable safety levels for automated functions and obstacle protective systems.
• Annexes A–D supply practical inputs for developing tests and simulations (human/obstacle properties, environmental factors, test objects, example procedures).

Applications and Who Uses It

ISO 18497-4:2024 is intended for:

• Machine manufacturers designing automated agricultural equipment and tractors.
• Safety engineers and test laboratories performing verification, testing and validation of automated functions.
• Regulators and market surveillance bodies assessing conformity and safety claims.
• Standards developers creating type‑C machine‑specific standards that build on these verification and validation principles.
• Service providers and maintenance organizations involved in commissioning, modification and ongoing validation of automation features.

Practical use cases include developing verification plans for obstacle detection systems, validating autonomous operating zones, and documenting safety evidence for partially automated field equipment.

Related Standards

• ISO 18497‑1:2024, ISO 18497‑2:2024, ISO 18497‑3:2024 (series on machine design and autonomous operating zones)
• ISO 12100:2010 (risk assessment and reduction)
• ISO 13849‑1/2 and ISO 25119 (safety‑related control systems and lifecycle for agricultural machinery)

ISO 18497‑4:2024 provides a structured, evidence‑based approach to testing and validating safe operation of automated agricultural machines, helping manufacturers and stakeholders demonstrate and maintain acceptable safety performance.