In reviewing the PLE data, Elizabeth Burke noticed that defects received from suppliers have decreased (worksheetDefects After Delivery). Upon investigation, she learned that in 2010, PLE experienced some quality problems due to an increasing number of defects in materials received from suppliers. The company instituted an initiative in August 2011 to work with suppliers to reduce these defects, to more closely coordinate deliveries, and to improve material quality through reengineering supplier production policies. Elizabeth noted that the program appeared to reverse an increasing trend in defects; she would like to predict what might have happened had the supplier initiative not been implemented and how the number of defects might further be reduced in the near future. Summarize your work i with all appropriate results and analyses

Defects per million items received from suppliers

Month 2014 2015 2016 2017 2018

January 812 828 824 682 571

February 810 832 836 695 575

March 813 847 818 692 547

April 823 839 825 686 542

May 832 832 804 673 532

June 848 840 812 681 496

July 837 849 806 696 472

August 831 857 798 688 460

September 827 839 804 671 441

October 838 842 713 645 445

November 826 828 705 617 438

December 819 816 686 603 436