These are residuals diagnostic plots from Minitab. In addition to the normality test, residuals are plotted against fits to examine for heteroskedacity or curvature. And, if the data are taken in time sequence, the time order plot is examined for shifts and trends that might indicate a latent variable. If the data are not in time sequence, this last graph is ignored.

This site has a good discussion on the residuals vs. fits analysis.

This site discusses both residuals vs. fits and residuals vs. time order.