Ireland sit fourth in this year’s championship with their sole win so far coming at home to Italy in round three.
Scotland are out to avoid the wooden spoon as they currently occupy sixth in the table without a victory.
They can draw from recent success against Ireland, having secured a dramatic last-gasp win in September when the sides met in Italy as Ireland’s hopes of qualifying for the World Cup were dashed.
“You don’t focus on the results because they’re a by-product of your process and how well you’re working away from the game,” McWilliams said.
“They happen as a result of your process. I just hope the process is good this week, and as a result we go on to get a win against a good Scottish side that beat us the last time we played.
“Our players have a point to prove and it’s another great challenge for them. We’re not focusing on the result, we’re focusing on making sure that all those small details in the game are filled with good actions.”
Ireland: Irwin; Doyle, Naoupu, Breen, Scuffil-McCabe; Caughey, Dane; Djougang, Jones, Haney, Fryday (capt), Monaghan, Wall, McMahon, O’Connor.
Replacements: Hooban, Pearse, O’Dwyer, McDermott, Moore, Og O’Leary, Hughes, Claffey.