I have a scatter plot which compares predicted vs observed values. What is the appropriate name for this type of plot?
To elaborate, I have a set of measurements for a specific engineering quantity at several moments in time. I also have a model which predicts the value of that quantity at those same moments in time. To illustrate the quality of the model, I am plotting each (prediction, measurement) pair as a point in a scatter plot, with the prediction on the $X$ axis and the measurement on the $Y$ axis. I'm also drawing the line $y=x$ on the chart as a reference. (Points on that line represent perfect agreement between prediction and measurement.)
I have repeatedly heard this type of plot referred to as a "Q-Q plot". According to the definition of a Q-Q plot given on Wikipedia, this is technically incorrect because I'm not plotting quantiles. I am trying to determine if popular usage of the term "Q-Q plot" in situations like mine has made that the de facto name for this type of plot. If not, then what is an appropriate name for this type of plot?