Overview
ISO/TS 19014-5:2021 is an internationally recognized technical specification developed by ISO for the earth-moving machinery sector. Titled "Earth-moving machinery - Functional safety - Part 5: Tables of performance levels," this standard provides normative tables specifying machine performance levels required (MPLr) for typical functions and machinery types, as defined in ISO 6165. These performance levels can be mapped or applied to safety control systems (SCS) to ensure that key functions of earth-moving machinery (EMM) achieve the required degree of functional safety.
The MPLr presented are determined using the machine control system safety analysis (MCSSA) process, as outlined in ISO 19014-1. This standard is relevant for machinery manufactured after its publication date and is aimed at manufacturers, system designers, safety regulators, and other stakeholders engaged in EMM design, integration, and operation.
Key Topics
- Machine Performance Levels Required (MPLr): The core content includes comprehensive tables mapping required MPLr to typical machine functions by machinery type, facilitating the implementation of appropriate safety functions across a range of earth-moving equipment.
- Functional Safety in EMM: Guidance is provided on aligning safety control system design and verification with established MPLr, supporting compliance and risk reduction.
- Risk Assessment & Safety Analysis: The standard references the MCSSA process defined in ISO 19014-1 for identifying required performance levels, supporting informed, systematic safety engineering decisions.
- Mapping Functions to SCS: The document helps manufacturers and designers trace key operational functions to corresponding safety control systems that mitigate risks and hazards.
- Technology Considerations: The guidance recognizes varying impacts of mechanical, electric, and hydrostatic technologies on required performance levels and prescribes reassessment where new technologies or unique applications arise.
- Practical Assumptions: The tables and analyses are based on typical machine usage across the industry, with notes on additional risk assessment for unique configurations or uses outside the standard's assumptions.
Applications
ISO/TS 19014-5:2021 is applied to:
- Earth-moving Machinery Manufacturing: Ensures that new EMM designs embed functional safety at the required performance levels, as per the latest industry standards.
- Safety System Design: Offers a ready reference for engineers and integrators to align safety control systems (such as brakes, steering, speed controls, operator presence systems) with rigorously determined MPLr, avoiding redundant or insufficient risk controls.
- Regulatory Compliance: Assists organizations in meeting legislative and market expectations around machinery safety by demonstrating application of recognized international best practices.
- Worksite Safety Optimization: By implementing prescribed machine performance levels, operators and employers can reduce workplace hazards, operational risks, and potential accidents.
- System Modification or Custom Application: When modifying a machine or applying it in new contexts, the standard guides re-evaluation of MPLr to ensure continued compliance with functional safety requirements.
Related Standards
For comprehensive implementation, ISO/TS 19014-5:2021 should be applied in conjunction with the following related standards:
- ISO 6165: Earth-moving machinery - Basic types – Identification and terms and definitions.
- ISO 12100: Safety of machinery - General principles for design - Risk assessment and risk reduction.
- ISO 19014-1: Functional safety - Methodology for determining safety-related parts of the control system and performance requirements.
- ISO 19014-2: Functional safety - Design and evaluation of hardware and architecture for safety-related control systems.
- ISO 19014-3: Functional safety - Environmental performance and test requirements for safety-related control system components.
- ISO 19014-4: Functional safety - Design and evaluation of software and data transmission for safety-related control systems.
Conclusion
By providing clearly structured tables and guidance for required machine performance levels, ISO/TS 19014-5:2021 supports safer earth-moving machinery design, operation, and integration. Its integration with related ISO standards ensures a comprehensive approach to functional safety for a wide range of earth-moving equipment, promoting best practices and enhancing risk management on construction and mining sites worldwide.
