Medical device manufacturers validate Excel spreadsheets. However when the version changes, from Excel 2003 to Excel 2007, for example, companies face a new set of issues. This is particularly important if some employees are on Excel 2003 and other on Excel 2007.
The article illustrates the problem using a simple example that relies on Conditional formatting used to track calibration status. The article, Excel Spreadsheet Validation with Multiple Versions is in the Medical Device Regulations section of the library.