ISO 14001, OHSAS 18001, and ANSI Z10 are based on which methodology?

ISO 14001, OHSAS 18001, and ANSI Z10 are all based on the Plan, Do, Check, Act (PDCA) methodology, which is a cyclic process promoting continuous improvement in management systems. This methodology emphasizes a systematic approach to global environmental and occupational health and safety management which aligns with the intentions of these standards.

The "Plan" phase involves establishing objectives and processes necessary to deliver results in accordance with the organization's policies. The "Do" phase entails implementing these processes, conducting training, and executing the strategy. In the "Check" phase, performance is monitored and measured against the objectives, allowing for evaluation of the effectiveness of the implemented processes. Finally, in the "Act" phase, the organization takes action to improve performance and make necessary adjustments, closing the loop of continuous improvement.

This cyclical and iterative approach ensures that organizations not only maintain compliance with required standards but also proactively enhance their practices over time, leading to improved environmental and safety outcomes.