Wales have lost all four games so far in the tournament and are looking for a first home victory against Italy since 2020.
Wales are also hoping to halt a 15-game losing streak in the tournament as they bid to avoid a third successive Six Nations clean sweep of defeats.
Tandy’s side can only not finish bottom of the table again if they secure a 50-point margin of victory against Italy and hope France achieve the same result against England.
“This week we need to go up another level,” said Tandy.
“We’ve had some good performances. There were parts against France, then we built up into the Scotland game where I thought we were very good.
“Against Ireland we stepped up to the plate physically. Now it’s putting it all together and creating our best performance this weekend.”
Wales are also searching for a first home Six Nations victory for four years since they beat Scotland in February 2022.
“For the team and myself, going back to Principality Stadium is amazing,” said Tandy.
“The boys did well creating their own energy against Ireland, but there’s nothing better than being at home.
“The boys reference in meetings what the Scotland game meant to them, as well as the matches against France and New Zealand.
“The fans have been incredible and I think they’re behind the team and the team are putting in performances to represent our nation.”
