Worst graph ever?
I just downloaded the Queensland government’s paper announcing, but not spelling out, a 30-year electricity strategy to be developed in the course of this year. I started with healthy scepticism about this, but scepticism turned to bemusement when, on page 5, I ran into one of the worst graphs I have ever seen.
This graph, taking up half a page, contains a total of six data points (energy intensity and gross state product for three states). The relevant data, such as it is, is contained in the three yellow bars. The legend describes them as “Electricity use (KwH) per $ of state product”, while the axis label claims that the measure is “Energy use (Mj) per $ of state product” Since a joule is a watt-second, it’s easy to check that a kilowatt-hour is 3.6 megajoules, but the difference isn’t large enough to work out which one is correct. It’s a fair bet, though not sure, that the quantity being measured is electricity use, and not all energy use. The only information conveyed is the unsurprising fact that Queensland’s economy is more electricity-intensive (or maybe more energy intensive) than those of NSW and Victoria.
The real joke, though, is the second measure, of total state product. This is of no interest at all, since it just reports the well known fact that NSW has a larger economy than those of Victoria and Queensland. But the thing that would make Edward Tufte turn in his grave (if he were dead, which Wikipedia tells me he is not) is that this irrelevant information is reported in a line graph, making it appear that there is some sort of relevant order here.
The rest of the graphics are almost, but not quite, as bad. There’s an amusing one describing the “engagement and accountability model”. Three Venn-style intersecting circles representing market, government and customer are overlaid with an equilateral triangle, the vertices of which are labelled “Engaged”, “Efficient” and “Effective”. All stakeholders are invited by the government to “get on board and challenge current thinking”.
Eager as usual to be a team player, I’ll be contributing some thoughts on the failure of electricity market reform to the Guardian, hopefully appearing tomorrow. I will certainly challenge current thinking and look forward to being welcomed on board by the Newman government.
fn1. Since no more explanation is given, I’ll take a stab at explaining the significance of these numbers. Assuming the Kwh measure is correct, and taking an average price of 15c/KwH, electricity amounts to around 3.3 per cent (0.15*0.22) of the total Queensland economy. That sounds about right to em.