When assessments fail, it is most likely due to the interval data file not been formatted
correctly. Interval data comes directly from the retailer in Excel and can be provided in
a variety of formats with any number of columns, worksheet tabs, header rows, or
include null data.
A sense check and clean-up of the data may be required for the assessment to run
successfully. The following are key things to check to ensure the data file is correctly
formatted: