Here is the community version for Odoo 8. There is also one for  Odoo 9.

https://github.com/OCA/hr/tree/8.0/hr_schedule

There is not example but you can do using working time and salary rules combination.

Regards, Mustufa

After looking at the hr module I found that it was impractical to handle a working shift schedule on OpenERP. It should be an additional module to do that. The hr module count the working day base on weekly schedule meanwhile a shift working schedule usually doesn't fit in one week duration. For several employee we can do it by making every day in a week as a working days and than encode every employee day off during the month's and then create a rule for that purpose. But if it should cover hundred or thousand's employee I think nobody willing to do that. I hope somedays it will be additional module for that purpose.