Surface roughness measurement is key for understanding fundamental interactions at the microscopic level and designing and optimising the surface in a wide range of applications, including tribology, adhesion, and overall performance of components in specific environments. ISO standards specify the methodology for the surface roughness measurements. However, these measurement methodologies are updated from time to time to match the technological advancement in measuring tools, making them much more accurate and real. Recently, the methodology for measuring profile surface roughness parameters was updated by ISO to make it much better aligned with areal surface roughness parameters. Therefore, this paper discusses changes in measuring methodology for determining the profile roughness parameters according to the new and old ISO standards, along with a quantitative comparison of the profile roughness values obtained using new and old ISO standards. A surface created by an abrasive water jet was used as an exemplary surface for quantitatively comparing profile surface roughness parameters using old and new ISO standards.
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