The idea would be to be able to manage working days according to specific groups of employees. Some of our manufacturing technicians work during the day, some during the night and some in the week-end. This option would either let you create a group of workers and assign them a specific work schedule OR when you create your smartsheet account you could choose your working days and when assigned to a task, the duration would take it into consideration and calculate the right number of days for the task.
What would be great is that it would all be in the same project plan sheet and we won't have 3 different sheets for 3 different work schedules.