This measure calculates the average number of months that elapse between product generations for primary products. It is a Cycle Time measure that helps companies analyze the duration (from beginning to end) of the "manage product and service life cycle" process, which manages the introduction and withdrawal of products/services.
Average lead time in months between subsequent product generations
Cycle time is the total time from the beginning of the process to the end. This includes both time spent actually performing the process and time spent waiting to move forward.