ISO 10303-240:2005

Overview

ISO 10303-240:2005 is an Application Protocol (AP) in the ISO 10303 series for product data representation and exchange. It defines the information requirements, context and integrated resources needed to exchange, share and retain computer-interpretable process plans for machined products. The standard covers both numerical control (NC) and manually operated manufacturing processes and links process plan data with associated product definition data (geometry, tolerances, materials).

Key topics and technical requirements

• Scope of data: process plans for single-piece mechanical parts and assemblies used for manufacturing; part routing, operation sequencing, and setup sequencing.
• Process planning content: machining features and classification, geometric and dimensional tolerances, material definitions and properties, and references to applicable standards.
• Work instructions & resources: task-level instructions, sequences, and references to required resources (tools, fixtures, machines).
• NC programming support: information required to support NC program generation and machine tool control.
• Shop floor & production planning data: manufacturing status, shop-floor instructions, and production planning attributes embedded in process plans.
• Data interoperability constructs: information requirements mapped to an Application Interpreted Model (AIM) and AIM EXPRESS representations to enable implementation and conformance testing.
• Conformance & implementation: conformance requirements, protocol implementation conformance statement (PICS) proforma, and annexes for implementation guidance and test suites.
• Traceability to upstream design: interfaces to capture product definition data (e.g., design exception notices, initial material data) from CAD/CAM or design systems.

Applications and who uses it

ISO 10303-240 is used to improve interoperability and data consistency across manufacturing IT and engineering systems. Typical users include:

• Manufacturing/process planners and CAPP (Computer-Aided Process Planning) vendors
• CAD/CAM and PLM integrators implementing product data exchange between design and manufacturing systems
• NC programmers and CAM engineers requiring standardized process plan inputs for toolpath generation
• Production planners, shop-floor systems, and MES integrators needing consistent manufacturing instructions and resource references
• Archives and data management teams focused on long-term retention of process plan data

Related standards

• ISO 10303 series (product data representation and exchange) - see other parts such as ISO 10303-1, ISO 10303-21, and ISO 10303-31 for foundational constructs and file/representation methods.
• The AP documents include mappings to AIM/AIM EXPRESS and normative annexes to support implementation and conformance testing.

By standardizing how process plans for machined products are represented, ISO 10303-240 enables reliable CAD/CAM, CAPP and NC toolchain integration, better production planning, and long-term archival of manufacturing intent.