Define
Problem, customer need, objective, scope, stakeholders and project charter.
Six Sigma Professional Development
Build disciplined problem-solving capability through DMAIC.
David Madanga Consultants develops practical Six Sigma capability from foundation awareness to improvement leadership, with a structured progression through Yellow Belt, Green Belt and Black Belt.
The operating method
Define. Measure. Analyze. Improve. Control.
DMAIC provides the common operating logic for the programme: define the performance gap, establish a factual baseline, validate the causes, implement targeted improvement and sustain the gain.
Measure
Process understanding, data plan, operational definitions and baseline performance.
Analyze
Stratification, Pareto, cause-and-effect, 5 Whys and validation of root causes.
Improve
Solution generation, risk review, pilots, implementation and performance comparison.
Control
Standard work, KPIs, response plans, ownership, audits and sustainment.
Credential pathway
Three belts with increasing application depth
The belt structure is designed to grow from DMAIC literacy to independent project execution and improvement leadership.
Foundation
Yellow Belt
Build core DMAIC literacy, process thinking, problem definition, basic data interpretation and frontline improvement participation.
- Six Sigma fundamentals
- Problem and goal statements
- SIPOC and process mapping
- Pareto, 5 Whys and cause-and-effect
- Basic improvement and control
Practitioner
Green Belt
Develop the capability to execute structured improvement projects using evidence, analysis, implementation planning and control.
- Project chartering
- Measurement and baseline design
- Variation and capability analysis
- Root-cause validation
- Pilots, control plans and close-out
Professional
Black Belt
Lead complex improvement, govern benefits, guide analytical decision making and coach developing improvement practitioners.
- Improvement portfolio governance
- Advanced analytical thinking
- Complex cause and risk analysis
- Solution optimisation
- Coaching and benefit sustainment
Credential assurance
Professional development that requires demonstrated application.
Each belt is structured around learning, knowledge assessment and applied evidence. The Certificate of Competence is intended to recognise successful completion of the prescribed requirements for the relevant belt.
Build the method
Develop the required DMAIC knowledge and tool understanding for the belt level.
Use the method
Complete a structured case, workplace project or applied improvement portfolio.
Demonstrate competence
Complete the prescribed assessment requirements before a credential is issued.
Programme leadership
Led by applied industrial experience.
The programme is led by Lizile Xulu, an Industrial Engineer, Certified Six Sigma Master Black Belt and Certified Six Sigma Coach with practical improvement experience across asset-intensive industries.
The course architecture connects structured problem solving with real operating environments, maintenance systems, process performance and continuous improvement.