ModelCensus toolkit · modelcensus_fmi4.1_any_pptxfromexcel_v1.txt
Use case: using an LLM to compile a PPTX from an Excel workbook
Failure mode: fmi4.1 Right method, wrong arithmetic · https://modelcensus.org/fmi/fmi_4_1
Model: any · Version: v1 · Published versions never change; an edit is a new version.
License: CC BY 4.0 · ModelCensus (modelcensus.org)

What goes wrong in this use case
The model picks the right formula (growth = (Q3 - Q2) / Q2) and then gets the arithmetic wrong, or rounds partway through, or recomputes a number differently on a later slide.

The guard
Compute every figure in a numbers table before writing any slide: the figure, its formula, the exact inputs, the result. Round only at the end. Slides copy figures from the table; they never recompute.

How to check it
Recompute two figures from the table by hand; they match the slide.

Example
North: (2,184 - 2,097) / 2,097 = +4.1%. The slide says +4.1%, copied from the table.