To increase production:
1 - upgrade your commercial buildings. On the left hand side, tap on the factory icon. You'll notice a small (i) above each factory. Tap on that to pay simoleons to upgrade that building.
2 - buy extra slots in each commercial building using the dollars you have. You can earn extra dollars by completing achievements.
3 - as you level up, you'll gain more factories. You can also upgrade from a basic 3 slot factory to 5 slot factories using simoleons.
Zzzzzzz only means you are not producing anything at the moment.
Thank you!! That was a big help. I was hard to find information on the "ZZZ's"a and how to get the factories to produce materials. Much appreciated.
You're very welcome. You can also find lots of tips on this Reddit forum: https://www.reddit.com/r/SCBuildIt/
