Climate risk is a practical supply chain concern, not a separate sustainability issue. The IPCC reports that weather and climate extremes already create impacts across borders through supply chains, markets, and natural-resource flows.
This article shows how Supply Chain Six Sigma teams can incorporate climate-related disruption into a DMAIC project charter. The goal is to give the team a clear mandate, measurable definitions, and controls that fit the organization's actual exposure.
Key Takeaways
- Define climate-related supply chain risk in the project charter.
- Set CTQs from customer needs and measured baselines.
- Use location, dependency, and recovery data to assess exposure.
- Apply FMEA and statistical tools only where the data support them.
- Sustain improvements through tested continuity plans and monitoring.
Why Supply Chain Six Sigma Starts With Climate Risk at the Charter Level
When climate exposure is managed outside the quality-improvement effort, a DMAIC team may lack the scope, data, or authority to address disruption-related variation. Adding the relevant risks to the charter connects resilience work to the process outcomes the team is accountable for improving.
This approach also keeps the project focused. Air Academy Associates' guide to Six Sigma supply chain resilience explains how DMAIC can organize resilience work without separating it from operational performance.
A charter does not prove that weather caused a late delivery or defect. It defines the question, the boundary, the metrics, and the evidence the team will collect before drawing that conclusion.
DMAIC Charter Components and Where Climate Resilience Criteria Fit
Standard charter elements remain useful in a climate-resilience project. The difference is that the team explicitly identifies relevant hazards, vulnerable suppliers, critical routes, and recovery expectations.
1. Problem Statement: Use Disruption-Related Quality Metrics
The problem statement should quantify the observed performance gap without assuming its cause. Compare disruption periods with an appropriate baseline, then test whether weather, infrastructure failure, supplier capacity, or another factor explains the difference.
- State how on-time delivery, lead time, or fill rate changed during defined disruption periods.
- Measure supplier defects with consistent definitions and comparable time windows.
- Record the frequency, duration, and operational effect of unplanned interruptions.
An illustrative problem statement might read: "During the last 18 months, on-time delivery averaged 86% during documented weather-related disruptions versus 94% during comparable normal periods." Replace those sample figures with validated organizational data.
2. Scope: Define Supplier Tiers and Exposure Zones
Climate-resilience projects can expand quickly unless the charter names the suppliers, locations, routes, product families, and processes in scope. The boundary should reflect where disruption creates a material customer or business impact.
- Specify the supplier tiers and facilities included in the study.
- Identify relevant hazards by location, such as flood, extreme heat, drought, wildfire, or severe winter weather.
- Define the product families and logistics stages included, and state what is out of scope.
The U.S. Climate Resilience Toolkit notes that exposure to extreme weather becomes especially consequential when supply chains depend on high-value products, specialized infrastructure, or limited transportation redundancy.
3. Voice of the Customer and Critical-to-Quality Requirements
Voice of the Customer includes external customers as well as internal stakeholders such as operations, procurement, finance, and compliance. Translate their needs into measurable CTQs rather than adopting universal targets.
- Define the required on-time delivery rate during specified disruption conditions.
- Set an acceptable supplier defect rate using the same denominator and inspection rules as the baseline.
- Establish recovery-time objectives for components or services whose interruption would materially affect customers.
Targets such as 95% on-time delivery or a 72-hour recovery time can be useful examples, but they are not standards that fit every supply chain. Set thresholds from customer requirements, risk tolerance, contracts, regulatory obligations, and verified baseline performance.
4. Risk Register: Put Climate Exposure in the Charter
A preliminary risk register gives climate-related risks a formal place in the project. It should be detailed enough to guide data collection while remaining open to revision as the team learns.
- List relevant hazards by supplier site and logistics corridor.
- Assess exposure, vulnerability, impact, and existing controls with documented data sources.
- Flag single-source dependencies and suppliers without tested continuity arrangements.
- Record assumptions, data gaps, risk owners, and review dates.
FMEA can begin once the team has enough process knowledge to identify credible failure modes; it does not have to wait for a rigid DMAIC phase boundary. Keep it as a living analysis and update it as measurements, causes, and controls become clearer.
5. Success Metrics and Key Risk Indicators
Every DMAIC charter needs a baseline, a target, an owner, and a measurement definition. For resilience work, choose a small set of metrics that reflects customer impact and recovery capability.
| Metric | Baseline | Illustrative Target |
|---|---|---|
| On-time delivery during defined disruptions | Measure from validated records | Close an agreed share of the gap to normal performance |
| Supplier defect rate during disruptions | Use a consistent denominator | Remain within the customer-approved limit |
| Time to recover a critical supply flow | Measure from incident records or exercises | Meet the approved recovery-time objective |
| Critical suppliers with tested continuity plans | Verify plan and exercise status | Increase coverage based on supplier criticality |
| Open high-priority risk actions | Count actions past their due date | Reduce overdue actions to the agreed threshold |
There is no universally accepted "operational resilience index" for this purpose. If the organization creates a composite score, document its inputs, weights, direction, owner, and interpretation so that changes remain meaningful.
6. Cost of Delay: Make the Business Case Concrete
Use organization-specific evidence instead of a generic disruption cost. Include lost contribution margin, expediting and premium-freight charges, contractual penalties, downtime, scrap, reinspection, and other costs that can be traced to the event.
- Estimate revenue or margin at risk per day for the affected product lines.
- Separate normal logistics expense from incremental disruption cost.
- State the timeframe, assumptions, and source records behind the estimate.
A credible cost-of-delay estimate can help a sponsor compare the project with other priorities. Label scenario estimates clearly and do not present hypothetical figures as company results.
Applying DMAIC Tools to Climate Risk Assessment in Supply Chains
The EPA's Six Sigma guide describes DMAIC as Define, Measure, Analyze, Improve, and Control. It places problem definition in Define, baseline measurement in Measure, root-cause confirmation in Analyze, solution implementation in Improve, and ongoing monitoring in Control.
In Measure, establish operational definitions and baselines for lead time, on-time delivery, defects, disruption frequency, and recovery time. Segment the data by supplier, route, hazard, product, and time period only when sample sizes and measurement quality support the comparison.
In Analyze, use process maps, cause-and-effect diagrams, Pareto analysis, and appropriate statistical tests to distinguish evidence from assumptions. Regression can estimate associations between hazard variables and performance, but it does not establish causation by itself.
In Improve, test responses such as alternate routing, qualified secondary sources, inventory-policy changes, early-warning triggers, or revised inspection plans. Readers working on delivery variation may also find this Air Academy resource on improving on-time delivery performance useful.
In Control, assign metric owners, response triggers, review frequency, and escalation paths. NIST guidance on control charts explains that control charts monitor quality over time and signal when a process may warrant investigation; they do not identify the cause on their own.
Connecting DMAIC With Business Continuity
DMAIC can improve a defined supply chain process, but it is not a complete business-continuity system. The ISO 22301 continuity framework covers planning, operation, monitoring, review, maintenance, and continual improvement for disruptive incidents.
Use the two approaches together where appropriate: DMAIC for a measurable process problem and the organization's continuity program for broader preparedness, response, recovery, exercises, and governance. Supplier diversification may reduce concentration risk, but it should be evaluated alongside qualification time, capacity, quality, cost, geographic correlation, and regulatory constraints.
Air Academy Associates' overview of practical Lean Six Sigma tools can help teams select methods that match the question and the available data.
Strengthen Your Supply Chain Six Sigma Skills With These Targeted Resources
Building climate resilience into DMAIC charters requires practitioners who can define projects, assess risk, choose improvements, and sustain results. These four Air Academy Associates offerings support those tasks.
Project Study Definition Course
This resource helps teams structure problem statements, goals, scope, stakeholders, metrics, and project boundaries. For climate-resilience work, use it to state the disruption problem and the evidence the project will collect.
Failure Mode and Effect Analysis (FMEA)
This short course covers the structured analysis of potential failure modes, effects, controls, and risk. Supply chain teams can apply the method to supplier, transportation, inspection, and continuity risks while following their organization's approved scoring and action-priority approach.
Prioritization Techniques Short Course
When several causes or proposed improvements compete for limited resources, prioritization methods help teams compare impact, effort, feasibility, and risk. Document the criteria and decision rules so stakeholders can understand how the ranking was produced.
Black Belt Online Course
Black Belt training can suit professionals leading complex, cross-functional improvement projects. This course covers DMAIC, statistical tools, project definition, stakeholder work, and control planning that can be applied to supply chain resilience projects.
Conclusion
Climate-related supply chain risk can be built into a DMAIC charter through a specific problem statement, clear scope, customer-based CTQs, an initial risk register, and measurable outcomes. The charter should authorize investigation, not predetermine a cause or impose unsupported targets.
When teams pair disciplined analysis with tested continuity arrangements, they are better prepared to improve everyday performance and respond to disruptions. The result is a resilience project tied to customer needs, operational evidence, and accountable control.
Air Academy Associates provides Lean Six Sigma and DMAIC training for teams that want practical methods for supply chain improvement and resilience. Explore the available training and choose the level that fits your role, project scope, and existing experience.
FAQs
What Is Six Sigma in Supply Chain Management?
Six Sigma applies data-driven process improvement to sourcing, production, logistics, and delivery. Teams define a problem, measure performance, analyze causes, improve the process, and establish controls to reduce defects or unwanted variation.
How Is Six Sigma Used to Improve Supply Chain Performance?
Teams define customer requirements and the performance gap, validate measurements, investigate root causes, test changes, and monitor the improved process. Climate-related projects can add disruption frequency, recovery time, and performance during defined events when those measures are relevant to the problem.
What Are Examples of Six Sigma Projects in Supply Chain?
Examples include reducing late shipments, shortening order-to-delivery lead time, improving inventory accuracy, lowering supplier defects, reducing premium freight, and improving warehouse pick accuracy. A resilience project might reduce recovery time, strengthen supplier-risk screening, or improve delivery performance during specified disruptions.
What Is the Difference Between Lean and Six Sigma in Supply Chain?
Lean emphasizes flow and the removal of non-value-added work, while Six Sigma emphasizes reducing defects and unwanted variation through data and statistical analysis. Lean Six Sigma combines the two approaches when a project needs both faster flow and more consistent performance.
Which Six Sigma Certification Is Best for Supply Chain Professionals?
There is no single certification level that is best for every supply chain role. Choose a program based on the complexity of the projects you will lead, the statistical depth required, employer expectations, the credential's assessment rules, and the training provider's transparency.
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