Scotland have lost all three of their matches so far but have been improving gradually since their opening day 76-0 defeat to England, scoring their first points of the competition last time out against Triple Crown winners Ireland.
Wales meanwhile, got their hopes of qualifying for next year's World Cup firmly back on track with their win over Italy but Edwards, who has made five changes to his side, is desperate to maintain the winning momentum.
"As a squad we've always talked about 'performance' and although we were up against it when we played France, we gained a lot of confidence from our win against Italy where the girls got the job done," said Edwards.
"Going into the game against Scotland we have to maintain the levels for the entire 80 minutes as we had a lot of possession against Italy but butchered five clear cut scoring chances.
"If we had been more ruthless with our finishing, our points difference ratio would be in a much healthier position going into this weekend's game."
Four changes have been made in the pack with prop Megan York and hooker Carys Phillips replacing Jenny Davies and Lowri Harries respectively while Vicky Owens comes in for Gemma Hallett in the second row and Sioned Harries returns to the back row at the expense of Catrina Nicholas.
The only change in the backline sees experienced winger Caryl James replace Rafiuke Taylor.