Deming’s Funnel Experiment Simulator
An interactive tool for demonstrating W. Edwards Deming’s classic funnel experiment, this simulator shows how different adjustment strategies affect process performance. By modeling the four funnel rules, it reveals the impact of “tampering” on variation, stability, and predictability—making abstract quality concepts concrete for learners and practitioners.
Key capabilities
- Run the four rules side by side:
- Rule 1: Leave the funnel fixed (no adjustment)
- Rule 2: Adjust to compensate for the last error
- Rule 3: Chase the last result (place over the previous drop)
- Rule 4: Set to offset the last deviation from target
- Configure scenarios: target position, inherent variation, number of drops, and random seed for reproducibility
- Visualize outcomes with scatter plots, trajectories, run/control charts, and histograms
- Compare rules using summary statistics (mean, spread, drift) and trend lines
- Step-through or auto-run modes for live demos and self-paced exploration
- Optional data export and sharable scenarios for classroom or workshop use
- Built-in guidance that explains what each rule demonstrates and why
What you’ll learn
- Why “tampering” increases variation and degrades performance
- How stable systems behave when left alone versus adjusted
- The difference between common and special causes of variation
- How these concepts connect to SPC, control charts, and everyday process decisions
Who it’s for
- Instructors teaching quality management or statistics
- Lean Six Sigma practitioners and facilitators
- Operations leaders and engineers
- Students exploring variation, systems thinking, and process control
Use the simulator to replace abstract lectures with vivid evidence: watch stability emerge under Rule 1 and see variance escalate under Rules 2–4. It’s a concise, compelling way to build intuition about variation and better decision-making in real processes.
Deming's Funnel Experiment Simulator is developed by Symphony Technologies. The most popular version of this product among our users is 1.0. The name of the program executable file is dfunnel.exe.
You can check Illumina Experiment Manager, Sales Funnel Ninja, Experiment Builder and other related programs like Fan Funnel X at the "download" section.
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