I was required to evaluate whether the current calibrations applied to some scales are allowing for accurate weight readings. I've read that since the scales control an aspect of production (i.e. the quantity of raw materials in a given product), I should conduct an MSA study on the scales. However, this is a very intermediate step in the overall process, and for this reason I had conducted an independent two sample t-test instead, comparing the scale readouts between a scale of interest and a separate/reliable scale. Is the t-test sufficient, or should an MSA test be conducted as well?