: Refer to the Daniel T. Li User's Book for detailed input requirements and code references.
Daniel T. Li is a vocal critic of volatile functions—specifically NOW() , TODAY() , RAND() , and INDIRECT() . He argues they create "spreadsheet hysteresis," where the model’s output changes not because the data changed, but because time passed or the sheet recalculated. daniel t li spreadsheets
While most Excel users stop at VLOOKUP (which Li calls "dangerously brittle"), his spreadsheets rely on the trinity. In his published case studies, Li demonstrated how replacing VLOOKUP with dynamic arrays reduced calculation time on a 500,000-row inventory sheet from 45 seconds to 0.3 seconds. : Refer to the Daniel T
Daniel Tian Li, Ph.D., an SE from California, developed a suite of professional-grade Excel spreadsheets through Engineering International that handle various structural components: Engineering International Design Scope: Li is a vocal critic of volatile functions—specifically
If you want to think like Daniel T. Li, do not just watch YouTube tutorials. Study these resources:
: Specialized modules for Two-Way Slabs , Voided Biaxial Slabs , and Special Shear Walls based on ACI 318-11 and CBC standards.
: Foundations (Wall Footings), Shoring (Sheet Pile Walls), and Handrails.