Any topic (writer’s choice)

Read the following article;
Study of an innovative method based on complementarity between ARIZ, lean management and discrete event simulation for solving warehousing problems.
Answer the following questions in 500 words or less.
1)    In your own words describe the objective of the study?
2)    What does DMAIC stand for and briefly describe how it is used?
3)    Do you feel that the study was successful?  why or why not?