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The example below demonstrates the required data structure of one record per analyte per replicate per test condition per timepoint to accurately represent data from a stability study.
The resulting structure would require 648 rows to illustrate the 12 analytes shown in the example study we received, done in triplicate under two test conditions at the number of timepoints in the example study.

For conciseness, we have abbreviated the examples below to demonstrate the concepts as follows:

First- we show all 12 analytes as a single replicate, at one time point and one test condition in order to illustrate the variables and terminology required to put together a stability study with assays  done in replicate at different time points and varying test conditions, even though only one record per analyte is illustrated.

Second-