This collaborative feature requires that the system be able to accept individual files, be it PDFs, Word, Excel, or any other safe file type, on a cell as a form of supporting documentation or as a part of a comment.
Scenario: A consulting firm uses CPM software to budget and forecast client projects. The team responsible for a particular project has supporting documentation for certain forecast values such as client estimates.
Solution: With collaboration tools built into their CPM system, team members can add comments directly to a cell or sheet, and include client estimates to justify the value of the cell.
Many systems on the market allow for the upload of comments, but not all of them allow specific files to be uploaded. This can be a useful feature for forecasting and justifying deviations from a specific budget to actuals report where actuals went over budget. Things like estimates, receipts, and other supporting documentation can be useful when the CFO is questioning the numbers.