Just another bit about the MS use of VE tables, this is a direct copy paste from the MSX forum, I felt it was well written.

The VE can be anywhere from 0 to 255. The way the fueling works is that Required Fuel is your base pulse width. Then it's multiplied by the entry in the VE table. For example, if you have a Required Fuel of 10 and a 50% VE, that scales the pulse width down to 5. After that, it's multiplied by air density correction and other factors to get the final pulse width.

So while both Required Fuel and the VE table do theoretically mean things about how the engine behaves, in the end they are just numbers that either work or do not.