ISO 18238:2015

Overview

ISO 18238:2015 - "Space systems - Closed loop problem solving management" defines a standardized, closed‑loop process for identifying, mitigating and preventing product quality problems in the space sector. Applicable to all space products from the engineering development phase onward, the standard covers failures, defects, accidents and other undesirable conditions and prescribes procedures for containment, root cause identification, corrective action and organizational lessons learned.

Key topics and technical requirements

• Scope & applicability: Applies to product quality problems that can affect cost, schedule, performance or mission success; relevant throughout development and production phases.
• Implementation planning: Organizations must prepare an implementation plan with adequate resources and integrate it into quality management activities.
• Problem reporting (Clause 6.1): Timely reporting with protected scene, records and essential contents (product data, phenomena, test conditions, observer).
• Immediate containment actions (Clause 6.2): Steps to mitigate impact - isolate defectives, stop processes or deliveries, increase inspection, perform recalls if necessary, assess immediate risks and criticality.
• Team formation (Clause 6.3): Multi‑functional teams including suppliers/customers where relevant; clear responsibilities and stakeholder communication.
• Problem definition and analysis (Clause 6.4–6.6): Precisely define phenomena and scope using factual evidence; use approved tools (brainstorming, fishbone, pareto, SPC, scatter plots, histograms, check/tally sheets, stratification, is/is not analysis).
• Root cause identification and corrective actions (Clauses 6.6–6.9): The process requires theoretical analysis and, when needed, recurrence experiments to validate root causes before implementing corrective actions.
• Lessons learned and closure (Clauses 6.10–6.12): Distribute findings across projects and the organization; maintain records and formally close the problem solving report.
• Records & reviews (Clauses 4.4–4.5): Maintain all records and review corrective action effectiveness before closure.

Practical applications and users

ISO 18238:2015 is intended for:

• Space systems engineers, manufacturing and test engineers
• Quality managers and program managers in aerospace organizations
• Suppliers, subcontractors and integration teams
• Safety and reliability engineers, and accredited test institutions Use cases include investigating recurring production defects, on‑orbit anomalies, launch site issues, test failures and incidents that could compromise mission objectives. The standard helps ensure consistent, auditable, and verifiable closure of quality problems and prevents recurrence.

Related standards

• ISO 10795 - Space systems vocabulary (normative reference)
• ISO 16192 - Lessons learned principles and guidelines
• ISO 23461 - Non‑conformance control system (relationship for deliverable non‑conformances)

Keywords: ISO 18238:2015, closed loop problem solving, space systems, root cause analysis, problem containment, lessons learned, space product quality, non‑conformance control.