TS EN ISO 8015

TS EN ISO 8015 is the foundational standard for geometrical product specifications (GPS), setting out the concepts, principles and rules that underpin how geometrical requirements are created, interpreted and applied. In practical terms, it provides the common logic used when reading geometric tolerances, form requirements and related indications across product documentation.

The GPS framework behind the document

Rather than defining one isolated tolerance method, this standard acts as a top-level reference for the whole GPS system. In general technical terms, GPS is the coordinated framework used to specify and verify geometry, including size, form, orientation, location, run-out and surface-related characteristics. ISO 8015 matters because it gives these concepts a consistent interpretation model across standards and applications.

According to the supplied scope, ISO 8015:2011 specifies the fundamental concepts, principles and rules valid for creating, interpreting and applying all other International Standards, Technical Specifications and Technical Reports concerning GPS and verification. It also applies to the interpretation of GPS indications on all types of drawings, with “drawing” understood in the broadest sense as the complete documentation package defining the workpiece.

Why interpretation rules matter in practice

In engineering documentation, the same geometric symbol can carry different meaning if it is read outside its intended system. ISO 8015 provides the common interpretive basis that helps align design intent, manufacturing practice and inspection language. It is therefore especially relevant where a workpiece is defined by a set of linked documents rather than a single traditional drawing.

• Defines the foundational interpretation principles for the GPS family.
• Frames how geometric indications are understood in drawings and related documentation.
• Treats a 'drawing' as the full workpiece documentation package.
• Supports a consistent relationship between specification and verification in GPS practice.