Should all organization consider implementing a compressed workweek?

Should all organization consider implementing a compressed workweek? What are the pros and cons?
Work Schedule Alternatives

Different types of work schedules have been developed to promote a work-life balance. The typical work week for most employees is five days per week and eight hours per day. Some organizations have implemented compressed work week schedules such as working 10 hour shifts four days per week or even 13 hour shifts three days per week. There are many pluses and minuses to the compressed work week schedule that HR managers should take into consideration. As practical examples, police officers and nurses are known to work a compressed work week.

Assignment Expectations
Should all organization consider implementing a compressed workweek? What are the pros and cons?

As an HR Manager, which would you promote for all employees and why:

5 days a week at 8 hours a day
4 days a week at 10 hours a day
3 days a week at 13 hours a day

Justify your response.
Assignment Expectations (Structure)
Your paper should be 2-4 pages, not including the cover sheet and reference page. You are expected to deal with these issues in an integrated fashion, rather than treating them as a series of individual questions to be answered one by one and left at that.