Greece Lean Six Sigma
Quantitative Methods in Process Improvement – DMAIC Framework
1. Purpose
Greece Lean Six Sigma formally commits to full alignment with ISO 13053, the international standard governing the application of DMAIC (Define–Measure–Analyse–Improve–Control) as the structured methodology for Six Sigma–based process improvement.
This Policy defines how ISO 13053 requirements are embedded into:
- training design and delivery,
- certification and assessment criteria,
- project-based learning and evaluation, and
- instructional governance and quality assurance.
ISO 13053 compliance ensures methodological rigor, comparability of outcomes, and data-driven integrity across all Lean Six Sigma programmes delivered by GLSS.
2. Scope of Compliance
This Policy applies to:
- Lean Six Sigma Green Belt and Black Belt training programmes,
- project-based certification and assessment activities,
- trainers, coaches, assessors, and curriculum designers,
- internal learning materials, templates, exams, and case studies.
The Policy covers both parts of the standard:
- ISO 13053-1:2011 – DMAIC Methodology
- ISO 13053-2:2011 – Tools and Statistical Techniques
3. Commitments Under ISO 13053
3.1 DMAIC-Centric Programme Architecture
(ISO 13053-1)
All Lean Six Sigma Green and Black Belt programmes are explicitly structured around the DMAIC framework.
Each phase includes:
- clearly defined objectives and deliverables,
- decision gates and review checkpoints,
- standardised templates and documentation,
- alignment with operational performance indicators.
DMAIC is presented as a governed improvement system, not a collection of tools.
3.2 Project-Based Certification and Assessment
(ISO 13053-1 & ISO 13053-2)
Certification at Green and Black Belt level requires the structured application of DMAIC through:
- real organisational improvement projects or
- controlled simulation-based projects where operational data is not available.
Projects are:
- documented using ISO-aligned templates,
- reviewed against methodological compliance,
- assessed on analytical rigor, not just results.
3.3 Standardised Tools & Statistical Integrity
(ISO 13053-2)
Participants are trained, coached, and assessed in the correct selection and application of Six Sigma tools, including but not limited to:
- SIPOC, Process Mapping, CTQ Trees
- Measurement System Analysis (MSA)
- Statistical Process Control (SPC)
- Hypothesis Testing and Regression Analysis
- Process Capability Analysis
- Control Plans and sustainability mechanisms
Training and analysis are conducted using Minitab®, SigmaXL®, or equivalent validated statistical software, ensuring reproducibility and accuracy.
3.4 Qualified Instruction and Governance
All ISO 13053-aligned programmes are delivered by:
- Certified Six Sigma Master Black Belts,
- instructors with documented project experience,
- trainers governed by the GLSS Code of Ethics and instructional standards.
Instructors are accountable for:
- methodological compliance,
- correct tool application,
- objective project assessment,
- alignment with ISO and certification requirements.
3.5 Continuous Improvement of Learning Assets
GLSS applies continuous improvement to all ISO 13053-related materials, including:
- curricula and syllabi,
- exam banks and assessment rubrics,
- project templates and case studies.
Reviews are conducted at least annually, or earlier when triggered by:
- learner and stakeholder feedback,
- changes in statistical best practices,
- sector-specific requirements,
- updates to ISO standards or accreditation guidance.
4. Why ISO 13053 Compliance Matters
ISO 13053 alignment ensures that:
- process improvement follows a globally recognised methodology,
- certifications are objective, comparable, and credible,
- organisations trust the analytical depth of delivered projects,
- professionals are prepared to lead high-impact, data-driven transformations.
Compliance protects both the learner and the organisation from superficial or tool-driven Six Sigma implementations.
5. Integration with GLSS Management Systems
This Policy forms part of the integrated GLSS Quality and Educational Management System and aligns with:
- ISO 9001:2015 – Quality Management
- ISO 21001:2018 – Educational Organizations
- ISO 29993:2017 – Learning Services
- ISO 18404:2015 – Lean & Six Sigma Competency Requirements
Approval & Governance
Greece Lean Six Sigma
Approved by: Victoria Tsolidou
Founder & Managing Director
Version: 1.1
Issue Date: 02.05.2024
Last Reviewed: 2025