From Kendra Scalia's Electronic Visit Verification (EVV) is Here:  What you need to know and how to get involved:

"It is not a surprise that NEVVA (nat'l electronic visit verification association) is attempting to stake claim to best practices in the home care industry via their mission statement.  They are eager to ensure states adhere to their set of best practices and then purchase their expensive products.  Standard EVV systems these vendors offer make it clear that they have no idea how home care services actually operate on a day-to-day basis or the realities faced on the ground.   One does not need to look any further than the most common EVV systems on the market as evidence that vendors are disconnected from the disability community. "