Proven? How? By what standard or metric? And for any business dashboard data vis? What does that even mean?
There are far too many outrageous claims in this article.
There is an example on creating a bullet chart in Excel. It starts with bar chart, which simple and easy to do and read. It then go through many steps to abstract and obscure some the information, to get to a chart that the author find more appealing. I don’t. I think a bar chart as more space and is more zen, while his chart feels crowded. Unless you start with only 3 bars, in which case it looks fine and doesn’t obstruct any information.
> To create a comparison range, you’ll have to pick a colour and make use of four different shades of colour. To help you do this, you’ll have to select the colours one after the other.
> Bear in mind that a bullet graph can either be horizontal or vertical in shape. As clearly mentioned above, the target of the organization must be feasible, and the right tools to reach the target should be provided for employees.
How did that last sentence end up in that paragraph?
Below that, it says you can draw these charts in JavaScript with a <chart> element, as if browsers natively supported it.