ISO 20947-2:2020

Overview

ISO 20947-2:2020 - Performance evaluation protocol for digital fitting systems - Part 2: Virtual garment - specifies a method to describe functions and evaluate the performance of the virtual garment pattern cutting and clothing simulation modules of digital fitting systems. The standard defines how to generate virtual garment patterns and test them on a virtual fit mannequin (fit form). It is part of the ISO 20947 series developed by ISO/TC 133 (Clothing sizing systems).

Keywords: ISO 20947-2:2020, digital fitting systems, virtual garment, virtual garment pattern, virtual fit mannequin, clothing simulation, pattern cutting, performance evaluation protocol.

Key topics and technical requirements

• Scope and applicability
  • Applies to the virtual garment pattern cutting and clothing simulation modules used by designers and pattern technologists.
  • No normative references are cited in the document.
• Functions and workflows
  • Describes functions such as data import, digital fitting, virtual sewing, and measurement of pattern/garment line lengths.
  • Defines the expected capabilities of modules that import virtual fit mannequins and virtual garment patterns.
• Lines, measurements and terminology
  • Standardizes terms and measurement locations on virtual patterns (e.g., hem line, armhole line, sleeve length, bust line, shoulder line, centre front/back).
  • Specifies methods for measuring lengths of these lines on virtual patterns and garments.
• Evaluation methods
  • Provides both qualitative and quantitative evaluation procedures.
  • Includes steps for 3‑D arrangement of virtual patterns, virtual sewing, and calculation of differences between pattern and simulated garment.
• Reporting
  • Sets out report formats and examples (Annex A, B, C) for qualitative and quantitative evaluation results.

Practical applications and users

• Who uses it
  • Fashion designers, pattern technologists (makers), apparel manufacturers, digital‑fitting software vendors, and educators in fashion technology.
• Use cases
  • Selecting or benchmarking digital fitting systems and virtual garment modules.
  • Validating virtual pattern generation and simulation accuracy before physical sampling.
  • Integrating virtual fitting into product development workflows to reduce prototyping cost and speed time‑to‑market.
  • Training pattern makers and students on standardised virtual measurement and reporting practices.

Related standards and context

• Part of the ISO 20947 series developed under ISO/TC 133 (Clothing sizing systems). Users should consult other parts of the series for complementary guidance on digital fitting and sizing where applicable.

This standard helps professionals compare and validate virtual garment workflows, ensuring consistent evaluation of digital fitting systems and improving confidence in virtual prototyping and fit assessment.