This chart would be for 'Serialization' dates based on the unit numbers and not necessarily when the cars were scheduled to be or actually built.
I read it as a list of VINs (example cars within 100400-125200) that were assembled during November 1967, looking backwards.
Looks like it shows when cars were actually built and not scheduled since that is normally fairly sequential compared to the car's (in this case) Ford VIN.
Don't think it works for projected date since Dearborn and San Jose list cars with VINs under 10 (first ten cars assigned a VIN) possibly being assembled four months after production started and if it was projected date its hard to believe that they would have skipped over/reserved VINs in the first 10 (for this example) for use four months later.
If it does represent real build dates then it shows the wide range of, at least a limited number of VINs, being not assembled during when Ford projected. Kind of supporting what we've accept for a while.
Just my take on the page & information presented on that page