It eliminates human error. You define a complex calculation once, with rigorous testing, and then reuse it thousands of times. If the logic needs to change, you change it in one place—the LAMBDA definition—and every instance updates instantly.
" associated with a prominent philosophy called "Spreadsheets Better," daniel t li spreadsheets better
Add a cell that flags inconsistencies. For example, “Check: Sum of Subtotal + Tax – Total should be zero.” If the check cell isn’t zero, your spreadsheet alerts you immediately. It eliminates human error
In the world of spreadsheets, few names are spoken with as much reverence—and caution—as Daniel Tian Li. As a structural engineer with over three decades of experience, his work offers a powerful lens for exploring how we can make spreadsheets better, more reliable, and more effective. While his name is often mentioned alongside a controversial password protecting his design files, the more important story is what his approach reveals: a disciplined method for treating spreadsheets not as throwaway data bins, but as serious, mission-critical tools. As a structural engineer with over three decades
For decades, the spreadsheet has been the unsung workhorse of the global economy. Whether you are in Excel, Google Sheets, or a niche platform like Airtable, the core mechanics have remained surprisingly static since the 1980s: a grid of cells, formulas beginning with an equals sign, and the eternal struggle of manual data cleaning.
One of the greatest risks of modern SaaS adoption is vendor lock-in. If a specialized platform goes bankrupt, hikes its prices, or suffers a prolonged outage, your business operations can grind to a halt. Extracting your data from a proprietary system via custom APIs is often a nightmare.