To display a cumulative percentage line, a multi-step table calculation is required. The primary Running Total calculation computes the cumulative sum of sales across the products. The secondary Percent of Total calculation then converts these cumulative sums into a percentage of the overall total. This result is placed on a second axis (Dual Axis), changed to a line mark, and synchronized with the primary axis to overlay the cumulative percentage line onto the original chart. This technique is a standard method for creating a Pareto chart to visualize cumulative contribution.

1. Salesforce

Tableau Desktop and Web Authoring Help. (2024). "Create a Pareto Chart". This official documentation provides the exact step-by-step instructions to add a running total percent of total line to a chart using a secondary table calculation and a dual axis

as required by the simulation.

2. Salesforce

Tableau Desktop and Web Authoring Help. (2024). "Transform Values with Table Calculations". Section: "Types of table calculations". This document defines the core functions used in the solution

specifically explaining the Running Total and Percent of Total table calculations.

3. Salesforce

Tableau Desktop and Web Authoring Help. (2024). "Build a Combination Chart with a Dual Axis". This document explains the concept and procedure for using dual axes to combine multiple measures with different mark types (e.g.

bars and lines) in a single view

which is a key part of the required solution.