Rolled Throughput Yield and Pareto Analysis Demo: Optimize Process Quality and Defect Reduction

Overview

The Rolled Throughput Yield (RTY) and Pareto Analysis application is designed to help you understand process quality across multiple serial steps and identify which types of defects contribute most to overall performance loss. By combining RTY calculations with Pareto charts, this interactive demo provides a powerful, visual way to prioritize improvement efforts and reduce defects in complex workflows. Powered by SpreadsheetWeb, it converts an Excel-based Six Sigma style model into a dynamic, browser-based tool for real-time quality analysis and decision support.

What the Rolled Throughput Yield and Pareto Analysis Tool Does

This tool evaluates the quality of a process that consists of several serial steps by calculating the Rolled Throughput Yield, the probability that a unit can pass through the entire process without defects. You can enter the number of units entering each step, scraps, reworks, and total defects, and the application computes yield metrics per step as well as the overall RTY for the system.

In addition to yield calculation, the model performs a Pareto Analysis of defections, ranking defect categories according to their impact and displaying them in a Pareto chart. This makes it easy to see which issues should be tackled first to achieve the largest improvement in quality and throughput.

Because this demo is powered by SpreadsheetWeb, all formulas and logic from the original Excel model are preserved, but exposed through an intuitive web interface. Users no longer need desktop spreadsheets to perform detailed yield and defect analysis—everything runs online with instant feedback and interactive data visualizations.

How It Works

The application is built around the concept of Rolled Throughput Yield for a series of process steps. Each step’s yield is computed using the selected method, either a straightforward ratio of non-defective units out of the total entering the step, or an exponential approximation based on defects per unit (DPU). These step yields are then combined to determine the overall RTY of the system, representing the probability that a unit can pass through all steps without defects.

The Pareto component aggregates defect data, ranks defect types by their contribution, and calculates cumulative percentages. The results are displayed in charts where you can see both the defect distribution and the cumulative impact line. This dual view highlights the “vital few” issues that cause the majority of problems, allowing you to focus on what matters most in your quality improvement initiatives.

Applications

The Rolled Throughput Yield and Pareto Analysis tool is ideal for:

• Quality engineers evaluating multi-step production lines.
• Process improvement teams running Lean Six Sigma or continuous improvement projects.
• Operations and manufacturing managers aiming to reduce scrap, rework, and defect rates.
• Students and trainers studying RTY, defect metrics, and Pareto principles in real-world scenarios.

It’s especially useful when you need to monitor performance across several stages of a process and determine which steps or defect types should be addressed first to achieve the highest return on improvement efforts. :contentReference[oaicite:0]{index=0}

Why Move from Excel to the Web?

Many RTY and Pareto analysis models start as Excel workbooks, but distributing, maintaining, and version-controlling those files can quickly become a challenge. By converting the underlying spreadsheet into a web application with SpreadsheetWeb, organizations can:

• Provide browser-based access to complex quality models without requiring any spreadsheet software.
• Ensure a single, up-to-date version of the logic for all users.
• Leverage interactive charts and responsive layouts on desktop and mobile devices.
• Securely share tools with internal teams or external stakeholders with controlled access.

The result is a modern, user-friendly experience for RTY and Pareto analysis, tightly aligned with your existing Excel logic but much easier to manage and deploy.

Interactive Demo

The live Rolled Throughput Yield and Pareto Analysis Demo allows you to input:

• The number of process steps in your system,
• Units entering each step,
• Scrap and rework counts,
• Total defects and units leaving the process.

With these inputs, the app calculates yields per step, overall RTY, and generates a Pareto chart for defects. You can experiment with different data sets and observe how changes in scrap or rework levels influence throughput and defect distribution. This makes it an excellent tool for testing improvement ideas before implementing changes on the shop floor.

FAQ

What does the Rolled Throughput Yield and Pareto Analysis tool do?
It calculates Rolled Throughput Yield across multiple serial process steps and combines it with a Pareto Analysis of defects, helping you understand overall process quality and which defect types have the greatest impact.

Who can use this tool?
The tool is ideal for quality engineers, process-improvement specialists, operations managers, and students working on Lean Six Sigma or other quality-focused projects.

What kind of data can I enter?
You can enter the number of process steps, units entering the process, scraps, reworked units, total defects, and units leaving the system. The application uses this information to compute step yields, overall RTY, and defect rankings.

Does this analysis include visual charts?
Yes. The application provides visual representations of yield metrics and Pareto charts that display defects and cumulative percentages, making it easy to interpret where the biggest problems are.

Can I embed this tool on my website?
Yes. SpreadsheetWeb allows you to embed calculators and models on your website or share them as standalone web applications, with secure access and custom branding options.

Note: This demo was created by converting an Excel-based Rolled Throughput Yield and Pareto Analysis model into a fully interactive web application using SpreadsheetWeb, preserving the original formulas while adding real-time interactivity, data visualization, and responsive design.