The primary challenge was tracking down and standardizing supporting data across a diverse range of sources (e.g. International Energy Agency, EV-Volumes EV sales records, internal sales projections from automotive OEMs like Tesla, GM, Honda, etc). This was done via a collection of Google Sheets that could be shared and collaborated on with the client.

A few of the visualizations required building models to generate output data under various scenarios. We used Observable notebooks to test and visualize these models with the client before setting the final input parameters.

Once the supporting data for each figure was in place, we began to design the figures. The workflow went from 1) sketches on pen and paper, to 2) prototype and refine figures in code (using Observable), to 3) final polish and annotations in Adobe Illustrator.

The final set of 14 figures was shipped off to the client and embedded in the full report.