New answers tagged time
You could use a stacked column chart with a threshold line and some sort of effect to emphasize when the threshold was reached e.g. You can add a legend to specify what each color stands for (which variable it is). BTW, I added an effect to the 2007 and 2008 columns by mistake - ignore them.
I worked on a commercial product where this was an important issue. Here are a few considerations in addition to the article referenced above discussing localization formats: How does the user identify the rows they need? If they are trying to identify the orders by first-in-first-out you can consider changing the date to something like "2 hours ago" or ...
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