Calculate net savings from Six Sigma DMAIC projects by comparing before and after COPQ minus project cost. Validate improvement ROI.
DMAIC (Define, Measure, Analyze, Improve, Control) is the structured problem-solving methodology of Six Sigma. Every DMAIC project should have a financial objective: reducing the Cost of Poor Quality (COPQ) by a quantified amount. The net savings calculation compares COPQ before the project to COPQ after, then subtracts the project execution cost.
This financial validation is critical at multiple stages: in the Define phase to justify project selection, in the Control phase to verify achieved savings, and in annual program reviews to demonstrate the return on the organization's Six Sigma investment.
This calculator takes the annualized COPQ before the project, projected COPQ after implementation, and total project cost (belt time, tools, training, capital) to compute gross savings, net savings, and ROI. It helps Black Belts and project sponsors quantify improvement value.
Integrating this calculation into regular operational reviews ensures that key decisions are grounded in current data rather than outdated assumptions or rough approximations from the past.
Without financial validation, Six Sigma programs lose credibility. This calculator provides the hard numbers that justify a project during selection and prove its value after completion. It bridges the gap between technical improvement metrics (Cpk, sigma level) and business results (dollars saved). This quantitative approach replaces subjective estimates with hard data, enabling confident planning decisions and more effective resource allocation across production operations.
Gross Savings = Before COPQ − After COPQ Net Savings = Gross Savings − Project Cost ROI (%) = (Net Savings / Project Cost) × 100 Payback Period = Project Cost / (Gross Monthly Savings)
Result: $115,000 net savings (256% ROI)
Gross savings = $240,000 − $80,000 = $160,000. Net savings = $160,000 − $45,000 = $115,000. ROI = $115,000 / $45,000 × 100 = 256%. Payback = $45,000 / ($160,000/12) = 3.4 months.
The most successful Six Sigma programs maintain financial rigor throughout the project lifecycle. Projects are selected based on financial opportunity. Charters include financial targets. Closure reports verify actual savings. Annual reviews aggregate program-level ROI. This discipline sustains executive sponsorship and program funding.
Savings projected during the Improve phase must be sustained through the Control phase. Implement control plans, monitoring systems, and response procedures to prevent regression. Savings that erode within months damage program credibility more than projects that never achieve the target.
Use financial analysis to build and prioritize the project pipeline. Rank potential projects by estimated annual COPQ reduction. Select projects that collectively deliver the organization's savings target. A healthy pipeline ensures continuous improvement and sustained financial returns year after year.
Include belt labor hours at loaded rate, Green/Black Belt training costs allocated to the project, consultant fees, equipment or tooling purchases, software, travel, and any overtime required for implementation. Documenting the assumptions behind your calculation makes it easier to update the analysis when input conditions change in the future.
Use the same COPQ metrics from the Define/Measure phase. Track them for 3–6 months post-implementation during the Control phase. Annualize the post-improvement rate for comparison against the baseline.
Most organizations expect at least 200–400% ROI on Six Sigma projects. Top projects achieve 500–1000%+. The median DMAIC project in manufacturing saves $50,000–$250,000 net per year.
Report them separately. Hard savings (reduced scrap, lower warranty) hit the P&L directly. Soft savings (avoided costs, capacity gains) are real but harder to verify. Executives appreciate the distinction.
Report actual savings honestly. Partial improvement still has value. Analyze why targets were not met — was the root cause incomplete? Was implementation inadequate? Lessons learned improve future projects.
Sum net savings across all closed DMAIC projects for the year. Compare total Six Sigma program savings against total program cost (including management, training infrastructure, and belt salaries). Report the program-level ROI.