VIN is just a number assigned when it is being scheduled for build...
Sequence number is on the build sheet.... Sequence number is what actually determines what order it went down the assembly line...
Very rarely are two consecutive VIN numbers built back to back....
When a vehicle is ordered, it gets assigned a VON (Vehicle Order Number)... This is what they use to track the order through the system until it gets assigned a VIN....
Then it must pass edit where they check all the sales codes to make sure that they are all correct and can be built together (no conflicts).... If it fails edit, the order is kicked back to the dealer to be corrected...
If the order passes edit, then it is assigned a VIN and then it goes into a 'pool' waiting to be scheduled....
When it gets to the front of the pool, it gets assigned a sequence number to go down the assembly line which determines which order it is built....
VON numbers are in increments of ten usually, in case they have to slip one in, then assign it a 5 or other last digit.... That way, it's easier to shuffle one or two in when the occasion arises....
