Exam 2 - Stat Process Control

Question 0

All processes have variation, to monitor variation we ….

Answer 0

Measure characteristics of process input and output

Question 1

The goal of statistical process control is to

Answer 1

Make a process stable over time and then keep it stable unless planned changes are made

Question 2

Control chart is a

Answer 2

Statistical tool for monitoring an input or an output of a process that had variation, alerting us when problem has occurred

Question 3

Process is a sequence

Answer 3

Of operations used in production, manufacturing

Question 4

Process IN statistical control

Answer 4

A process whose input s and outputs exhibit natural variation when observed over time

Question 5

Caution: a process in control does not guarantee

Answer 5

Good quality

Question 6

Construction of control chart

1. Draw…
2. Draw
3. Plot the

Answer 6

1. Draw a horizontal line at mu
2. Draw horizontal control limits at mu+- 3sigma/square root of n
3. Plot the means (x- bars) from the samples of size n against time

Question 7

Out of control signals - 2

Answer 7

One point above or below UCL

Run of 9 points in a row on the same side of the centerline

Question 8

If out of control signal observed, ….. The process and look for a cause

Answer 8

Stop

Question 9

T/F we expect natural variations around our target value on the control chart

Answer 9

True

Question 10

Natural variation

Answer 10

Ordinary or expected

Question 11

When Variation observed and due to a problem or the chart is out of control, you should —-4 steps

Answer 11

Stop, identify cause , adjust, and restart