TS EN ISO 8015

TS EN ISO 8015 is the fundamentals standard for geometrical product specifications (GPS), setting out the core concepts, principles and rules used across the field. It provides a common framework for interpreting geometrical indications in technical drawings and in broader product documentation, so that form, size, orientation and location are understood consistently in engineering communication.

Why it matters in the GPS system

Rather than defining a single product tolerance, this standard establishes the general basis for interpreting other GPS standards, technical specifications and technical reports. In the GPS framework, symbols, tolerance frames, datums and verification statements only work reliably when the underlying concepts are shared. ISO 8015 therefore helps align the technical meaning behind a drawing indication, not just its visual appearance.

A broad view of ‘drawing’

In this standard, the term “drawing” is interpreted in the broadest possible sense. That means it covers the complete documentation package that specifies a workpiece, not only a traditional paper drawing. In general technical practice, this includes drawings, notes, digital product definition data and related specification records, all of which may carry GPS information that needs to be read in the same way.

• Provides the shared conceptual basis for GPS terminology and use.
• Supports consistent interpretation of geometrical indications.
• Treats a drawing as the full product-definition documentation package.
• Serves as the foundation for applying other GPS documents.