ISO 19826:2017

Overview - ISO 19826:2017 (Space systems - Management of product characteristics)

ISO 19826:2017 specifies programme management requirements for the identification, classification and control of product characteristics in space systems. It is intended to highlight areas of a product - particularly mechanical parts and fluidic equipment - that require specific attention, control or inspection to support product quality, traceability and mission success. The standard frames a lifecycle process from identification and classification through implementation and close-out, helping suppliers and designers apply cost‑effective, documented controls.

Key topics and technical requirements

• Classification scheme: Product characteristics are classified by severity into critical, major and minor characteristics based on their effect on mission performance and safety.
• Identification process: Identification includes requirements analysis, design analysis and selection of inspection units. Inputs include mission requirements, lessons learned and historical data.
  • Requirements analysis covers functions, duration of performance, environmental limits, maintenance availability and failure effects.
  • Design analysis examines materials, fabrication, interfaces, interchangeability, life, failure modes and handling.
• Inspection unit selection: Guidance on choosing inspection units (end product, spares, items requiring interchangeability, items only inspectable in service, or items costly/impossible to replace after installation).
• Management implementation: Establishment of control plans for critical and major characteristics, annotation of drawings/specifications with classification codes, and process control and data management to maintain traceability.
• Responsibilities and documentation: Product designers primarily identify/classify characteristics; product assurance, process and inspection teams participate. Analysis results must be documented and reviewed; customers may be involved.
• Lifecycle emphasis: Identification begins in preliminary definition and is refined through detailed design; control is enforced through production and inspection to preserve mission assurance.

Practical applications and users

Who uses ISO 19826:

• Space system suppliers and subcontractors (mechanical and fluidic hardware)
• Product designers, systems and design engineers
• Quality assurance, configuration and data management teams
• Manufacturing and inspection personnel
• Programme managers focused on mission assurance and cost-effective quality control

Practical benefits:

• Focuses inspection and manufacturing effort on characteristics critical to mission success
• Improves design-to-production traceability and annotation on drawings/specifications
• Supports risk-informed inspection plans and resource allocation
• Enhances international consistency and supplier/customer communication

Related standards

• ISO 27025 (Space systems - Quality assurance requirements) - normative reference in ISO 19826
• ISO 9000 and ISO 10795 - referenced for terms and definitions

Keywords: ISO 19826, product characteristics, space systems, critical characteristics, major characteristics, inspection unit, programme management, quality assurance, mechanical parts, fluidic equipment.