The $15 hourly minimum wage got its start in Seattle. Now the city has taken a new step for part-time, low-wage workers who have to be on call whenever they're needed. In fast food and retail, algorithms determine when business will be hot or cold, and employers set work schedules without advance notice. What about the workers' needs: plans for childcare, time off for illness -- or additional part-time jobs that allow them to make ends meet. Seattle's new rules include two weeks' advance notice for work schedules and 10 hours' rest between shifts. Do employers accept them? Will they become a failed experiment or a model for the rest of the country?