In their article “Statistical methods for assessing agreement between to methods of clinical measurement” Bland and Altman describe how to measure repeatability when having two repeated measurements. They shortly mention that:

"If we have more than two repeated measurements the calculations are more complex. We plot the standard deviation of the several measurements for that subject against their mean and then use one-way analysis of variance, which is beyond the scope of this article.”

Does anybody know how this works?

Or where a detailed description of this procedure can be found?