Lean Six Sigma Green Belt ISO 18404 - Upgrade

The Green Belt upgrade follows the proven DMAIC methodology, a structured, data-driven approach to solving problems and improving processes. Here's what you'll master in each phase:

Define phase

Learn to frame improvement projects effectively and align them with business processes and objectives.

• Project selection:Identify high-impact opportunities and prioritise initiatives.
• Voice of the Customer (VoC): Capture customer needs and translate them into measurable requirements.
• Stakeholder statistical analysis:Map stakeholders, understand their concerns, and build buy-in.
• Project charter: Create a clear roadmap that defines scope, goals, and success metrics.

Measure phase

Collect reliable data and establish baselines to understand current performance.

• Data collection: Design sampling strategies and ensure data accuracy.
• Process mapping: Visualise workflows and identify bottlenecks.
• Minitab introduction: Use statistical software to analyse data and generate insights.
• Measurement system analysis: Validate that your measurement tools are accurate and consistent.

Analyse phase

Dig deeper to uncover the root causes behind process problems.

• Root cause analysis: Apply tools like fishbone diagrams and the 5 Whys to identify underlying issues.
• Hypothesis testing: Use statistical tests to validate assumptions and determine significance.
• Correlation and regression: Understand relationships between variables and predict outcomes.
• Value stream mapping: Map the flow of value and eliminate non-value-adding steps.

Improve phase

Develop and test solutions that address root causes and deliver lasting improvements.

• Solution selection: Evaluate alternatives and choose the best approach.
• Mistake proofing (Poka-Yoke): Design processes that prevent errors before they happen.
• Process balancing: Optimise workflow and reduce cycle time.
• Implementation planning: Create actionable plans to roll out improvements smoothly.

Control phase

Ensure improvements stick by monitoring performance and embedding new standards.

• Control plans: Document procedures to maintain gains and prevent regression.
• Statistical process control (SPC): Use control charts to track performance over time.
• Sustaining improvements: Build a culture of continuous improvement and handover to process owners.

ISO 18404 Competency Requirements

This Lean Six Sigma course is fully aligned with the ISO 18404:2015 standard, which defines the competencies required for Lean Six Sigma practitioners. By completing this upgrade, you'll meet the international benchmark for Green Belt proficiency, demonstrating verified capability in both technical application and structured improvement leadership.

This Lean Six Sigma Green Belt certification course typically lasts for five days of training via virtual classroom sessions. You'll receive hands-on guidance from expert instructors and benefit from real-world examples, group discussions, and exam preparation.

Earning your Green Belt Six Sigma certification involves passing an online, proctored exam that tests your understanding of the Lean Six Sigma Methodology and technical tools.

Exam details

• Format: Online, proctored, multiple-choice, closed-book
• Duration: 50 minutes
• Questions: 60 questions
• Pass mark: 65% (39 out of 60 questions)

Exam requirements

• A valid photo ID (passport or driving licence)
• A laptop or PC with a stable internet connection
• A working webcam and microphone
• A quiet environment with no study materials present

The exam voucher fee is included in the classroom course fee for Lean Six Sigma Green Belt certification, and you'll receive one free resit if needed. Scheduling for your exam can be booked up to 3 days after registering with ProctorU. Full instructions will be provided upon redeeming your exam voucher. 

We recommend scheduling your exam within 6 weeks of completing the course, while the material is still fresh. Results are provided within 5 working days.

Certification maintenance

Your Green Belt knowledge is yours for life. However, some certification bodies require annual maintenance fees or recertification every five years to keep your credentials active. For UK residents, the annual maintenance cost for Lean Six Sigma Green Belt certification is £36, and the recertification is £89, paid every five years. Fees may vary by country.

The Green Belt ISO 18404 Upgrade is a globally recognised certification designed for learners who have already completed the Yellow Belt training. That foundation matters, because Green Belts can lead small-to-medium-scale process improvement initiatives and support Black Belts in larger sigma projects.

Some certification routes also set extra requirements. For example, certain bodies such as ASQ may ask for around three years’ work experience linked to the Six Sigma Body of Knowledge for Green Belt certification.

Participants in the Lean Six Sigma Green Belt course will receive a comprehensive training package, such as materials, exams, and certifications.

Prerequisites

• You must hold a valid Lean Six Sigma Yellow Belt certification. Evidence of your previous certification is required before accessing the course materials.

Who should enrol?

This course is ideal for professionals who want to advance their project management career and are ready to take on leadership roles in process improvement, including:

• Managers: Lead improvement initiatives and drive performance across teams.
• Project Leaders: Apply structured problem-solving to deliver measurable results.
• Quality Engineers: Enhance product quality and reduce defects.
• Continuous Improvement Specialists: Build expertise in data-driven decision-making.

If you haven't completed a Yellow Belt, you may prefer our full Green Belt course. This advanced training includes both the Yellow and Green Belt trainings.

e-Careers Lean Six Sigma training offers flexible learning options to suit your schedule and preferences. Whether you prefer live instruction or self-paced study, we've got you covered.

Delivery Method:

Virtual Classroom

• Duration: 5 days
• Schedule: Scheduled dates with a live instructor
• Interaction: Interactive discussions and Q&A
• Support: Live instructor guidance
• Best For: Those who prefer structured learning and real-time interaction

Self-Paced eLearning

• Duration: 40 hours (flexible), short training periods
• Schedule: 24/7 access, learn at your own speed
• Interaction: Self-directed with tutor support
• Support: 12 months of course access
• Best For: Busy professionals who need flexibility

Achieving Lean Six Sigma Green Belt certification opens the door to more lucrative job opportunities. Certified Lean Six Sigma professionals are highly sought after in the job market, where you’re expected to improve, not just deliver the day-to-day. Employers value the certification across industries such as healthcare, manufacturing, finance, and IT because it signals you can use structured methods to reduce waste, cut errors, and improve performance.

Common job roles include:

• Lean / Continuous Improvement Engineer
• Quality and Continuous Improvement (CI) Engineer
• Product Manager
• Quality Manager

With Green Belt skills, you’re well placed for careers in quality management, common process improvement tools, and operational efficiency, and it often supports progression into higher-paid roles and greater responsibility.