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Message: <blockquote data-quote="pretzel_man" data-source="post: 479143" data-attributes="member: 927">Ms. Here is how they do it.... When the hardware is first installed, it starts gathering data.  They don't have a PCM with the drivers at this point.  Of course, drivers have an idea that something is going on because they see the new hardware. After gathering data for a period of time, they create a baseline.  This baseline is used to track improvements. This is how they claim a success rate.  They measure the % reduction in bulkhead door left opened, idle time, non seat belt usage, etc. I've heard of improvements in accident frequencies as well as analysis by Liberty Mutual.  I don't have more information than that. P-Man</blockquote>