1-How has operations management changed since its early days as scientific mana

 1-How has operations management changed since its early days as scientific management? 
2-  What are the differences between Lean and Six Sigma? What are the similarities? Would you like to see both in your organization? Why or why not?  
3- What job-sequencing rule do you see most often in healthcare? Why? Can you think of additional job sequencing rules not described in this text?