Definition of Time Value Map:
Generated by tracking a work item through the process and tracking where it spends its time. Only work that is seen as Value added by the customer is plotted above the middle line; everything else is waste in their eyes.
The concept of a Time Value Map is simple: We can track any work item into one of the 3 categories. 1) Value added work 2) Waste that is unavoidable due to business reasons (the work or functions for which the customer does not pay for e.g., payroll, legal, regulatory) and 3) delays/waste.
Then a time line is drawn and the time segments is marked off for each category. The idle queuing time is represented by the blank space.