SAP reports that would otherwise run for a LONG time can implement parallel processing to help alleviate the issue.

What questions should be asked when defining a workflow relevant business process?

Use this function to create a valid GTIN check digit number - Can also be modified to validate a check digit for a GTIN number.

A simple copy-and-paste of an SAP program to upload an Excel in to an internal table

If you are not sure as to the structure of the table prior to executing a program then you need to define the table dynamically - Here's how