Sharepoint - need solution for checklists and processing action items

In my department processes are pretty bad and mostly everything's done through e-mail.
Since Sharepoint is deployed, I was wondering what fellow Sharepoint enthusiasts here might recommend for my situation.

We have a server decommissioning process, where we have a check list we go through, and each item is owned by somebody in the dpeartment  like:

[ ] Create ticket for server removal (Bob)
[ ] Remove the server from backups (John)
[ ] Remove monitoring of the server (Jason)
[ ] Notify server owners

and so on...

What kind of Sharepoint solution could make this process easier outside of e-mail and copying/pasting, that would:

1. Archive/backup past checklists so we can go back and reference when servers were removed
2. E-mail people notifications when items on the checklists were checked off, and e-mail when they have a new task assigned (the URL to the "checklist" perhaps?