The move to a phone-based reporting system follows widespread concern about the caucus process after a meltdown in Iowa earlier this month. But even relying on a phone hotline is not foolproof: In Iowa, some caucus chairs waited on hold for hours while trying to report results, and operators were flooded with nuisance calls after the phone number was leaked online.

The 2020 caucus process is far more complex than it has been before; Democratic National Committee rules put in place for this presidential cycle require reporting two sets of raw vote totals for each candidate in addition to the delegate figures, and Nevadans were able to cast their ballots early for the first time.

A Nevada Democratic official said the party and its volunteer precinct leaders would still use the Google application to calculate results and commingle early-vote and in-person caucus totals. But the results the party plans to publicly report Saturday, the official said, will come from the numbers sent by phone and text message from the state’s 2,097 precincts.

“After their precinct caucuses conclude, the precinct chairs will call a hotline to securely report their results to a trained operator, will submit via text a photo of their caucus reporting sheet to state party staff through an established MMS reporting hub, and then they will return their caucus reporting sheet and other materials to their Site Lead,” Ms. Mounce wrote.

Nevada Democratic officials had long planned to report caucus results via a smartphone app build by Shadow Inc., but abandoned those plans when Shadow was part of the high-profile chaos in Iowa that led to days of delays before full results were known.

The Nevada state party then announced it would report results through the Google Forms tool. Technology experts from Google, the Democratic National Committee and DigiDems, the incubator of technology talent for Democratic campaigns, are in Las Vegas to help support the Nevada caucuses.

Over the last week the state party has held several training sessions for volunteers who are overseeing the caucuses. The precinct leaders have been told how to use and operate iPads and given instructions on how to tabulate and enter their caucus results into the Google Forms application.