It Is Said That "The First Step to Improving a Process

Multiple Choice

It is said that "the first step to improving a process is to understand it." Which of the following may be helpful in gaining an understanding of the process?

A) A flowchart showing all the stages of a process
B) A cause-and-effect diagram showing the logical relationships between the inputs,the stages of a process,and the outputs
C) A histogram of the measurements made at a specific stage of the process
D) Any and all of the above
E) Only A and B