To ensure that your results are valid, consider the following guidelines when you perform the analysis and interpret your results.
- Perform a stability study first
- You must perform Stability Study before you can predict responses for new observations.
- Verify that the model meets the assumptions of the analysis
- If the model does not meet the assumptions of the original analysis, the predictions can be inaccurate.
- The values of the variables should be within the range of the data that you used to fit the model
- Be cautious when you extend predictions beyond the original data because you cannot be certain that the relationships remain consistent. For example, a medication could lose strength more rapidly after the point at which your data ends. Only further testing with older samples can confirm that your shelf life estimate is accurate.