The Pareto Principle, also known as the 80-20 rule, is a powerful concept that can transform your approach to data analysis. This principle states that roughly 80% of effects come from 20% of causes.

As Microsoft ramps up Copilot’s capabilities in Excel, the AI tool is becoming genuinely useful for spreadsheet work.

Q. You explained Excel’s Scenario Manager in your November 2024 Tech Q&A article and Goal Seek in your December 2024 Tech Q&A article. Can you please explain the final What-If Analysis tool: Data ...

Discover 15 modern Excel functions for 2026, including Group By and Scan, so you speed up your workflows, summaries and ...

Q. In your November Tech Q&A article on Excel’s Scenario Manager, you mentioned two other “what-if” tools: Goal Seek and Data Table. Can you show how those work like you did with Scenario Manager?

Dynamically visualize your data.

This is an overview of what cost analysis is all about, the types of cost analyses we implement at the IRC and what kinds of questions they can answer. Watch the full Cost analysis in Excel playlist.

Microsoft updates for Excel in January 2026 introduce Agent Mode with Copilot, new import tools, clearer error messages, Power Query on Mac and Web, and Office Scripts automation to ease daily tasks.

Presenting a clear, presentable plan to clients starts with understanding the context and framework of their goal. Giving clients useful information that is relevant to their plan may still not ...