Carter Voekel

2025 Week 34 | Sigma: Let’s Request Some Data Changes

Can you create a data request and approval app? Introduction This week, we’re moving beyond analysis and into data apps. We’re going to solve one of the most persistent problems in any data-driven organization: data quality. The challenge isn’t just to clean data. It’s to build a complete, self-service system that empowers your business users …

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2025 Week 30 | Sigma: Do you NPS? Why yes.

Can you create a feedback app? Introduction This week, we’re switching gears — from surfacing insights to capturing them. Using just a few of Sigma’s core features — input tables, controls, and actions — you can build a fully embedded NPS tool that lives right inside your dashboard. No scripts, no third-party forms, and no …

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2025 Week 18 | Sigma: Can You Re-imagine This Map?

Can you re-imagine this influential map? Introduction In 1854, Dr. John Snow mapped cholera deaths in London to investigate how the disease was spreading. At the time, most believed cholera came from “bad air.” Snow used mapping to reveal a strong cluster of deaths around a single water pump on Broad Street, proving that contaminated …

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2025 Week 14 | Sigma: Can you Create a Small Multiples chart?

Can you make a small multiples chart? Introduction Edward Tufte, often called the godfather of data visualization, brought a minimalist, no-nonsense approach to presenting information. In his seminal 1983 book The Visual Display of Quantitative Information, he introduced a now-iconic concept: small multiples — a simple but powerful way to show data through repetition and …

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