I visited Ivrea from Torino by train on a Sunday morning and spent the first half of my 3 hours there walking around. 

There is a map at http://www.ivreacittaindustriale.it/ as well as on sign posts around town. I did not visit all the elements in the map of this industrial city of the last century but tried to see some of the more interesting places. 

One of the sign posts pointed to Villa Casana on a hill park in front of Talponia as offering the panoramic view of the town. There are 2 gates to the park, and one of them was slightly open, so I walked in.  By the time I go to the Villa I learned at http://www.archiviostoricolivetti.it/ that this villa houses the Olivetti Historical Archive with a permanent exhibition called "One Hundred Years of Olivetti, the Industrial Project." But the Archive was closed on weekend. There was a security guard in a car parked in front of the villa, who asked me how I got in and told me to go back to where I came in from.  So I turned back without seeing the panoramic view. 

I would say visiting Ivrea on a Sunday morning was good and bad because everything was closed. 

I spent the second half of my visit having a piece of dry pizza at the train station and waiting for my train back to Torino.