Operation of WPP[edit] WPP is run prior to compilation (in other words, before even the C preprocessor), and generates a trace message header for each file that it processes (by default this header is filename.tmh, where filename is the name of the processed source file). WPP's understanding of C/C++ syntax is very limited.
Divide the new value by the old value and multiply by 100 to find the absolute relationship between the two values. A process that is similar (but not identical) to the process used to find percent change is that used to find the absolute percentage relationship between the old and new values.
Because escalation is dependent on the percentage of change in an index rather than the actual gross change, the system uses the following formula: (Current index - base index) / base index. In the sample calculation, the base index is 462.200. The gross change is 10.610, but the gross percent change is 2.30%.