Chapters 1-3 Flashcards
SPC
Statistical Process Control
Things you expect to happen
Common Cause Variation
SQC
Statistical Quality Control
TQM
Total Quality Management
5 Key Quality Concepts
Management Commitment, Management Systems, Statistics, Teams, Training
Two ways to measure spread
Range and Standard Deviation
3 ways to measure central tendency
Mean, Median, Mode
Most common ways of measuring variation
Mean and Standard Deviation
Distribution with common cause or stable process
Normal Distribution
LSL
Lower Specification Limit
USL
Upper Specification Limit
Cm
Measurement Capability Index
Cp
Process Potential Index
Cpk
Process Capability Index
Ppk
Process Performance Index
What sigma is the national average?
4 sigma or Cp of 1.33
If process calculated Cpk of 0.33, what can I say about the ability of my process to meet my customer’s expectations?
a) it will be OK
b) It would be difficult to meet
c) It will meet them most of the time
d) I can’t say one way or another
b) it would be difficult to meet
What is Greek letter for sum?
Σ
The term Cpk is used to help a manufacturer determine if their process:
a) will allow their products to be sold
b) will allow their products to meet a customer’s specifications
c) will meet with cost projection for each quarter of the year
d) none of the above
b) will allow their products to meet a customer’s specifications
If you drive to work everyday, which of the following variables below would be considered common cause?
a) traffic b) flat tire c) traffic lights d) all of the above e) A & C
e) A & C
Most used central tendency
Mean
If you have a completely normal distribution, which of the percentages below represent ±2σ?
a) 50% b) 95% c) 33% d) 99%
b) 95%
The term central tendency refers to:
a) the name of a building
b) the tendency to be centralized
c) the center or middle of a distribution of data
d) none of the above
c) the center or middle of a distribution of data
When collected data fits under a bell-shaped curve, the general name for this situation
normal distribution
Special cause variation is:
a) normal variation
b) known variation
c) abnormal variation
d) none of the above
c) abnormal variation
Cp is calculated using USL, LSL, and σ. What word best describes Cp?
a) capability
b) productivity
c) potential
d) none of the above
c) potential
If process calculated Cpk of 1.33, what can I say about the ability of my process to meet my customer’s expectations?
a) it will be OK
b) It would be difficult to meet
c) It will meet them most of the time
d) I can’t say one way or another
c) It will meet them most of the time
SQC and SPC methods are based on the premise that process have:
a) starts and stops
b) zero variation
c) inherent variation
d) none of the above
c) inherent variation
Which of the following concepts must be considered when defining quality?
a) conformance
b) consistency
c) performance
d) all of the above
d) all of the above
The most common used measure of spread is:
a) range
b) standard deviation
c) Poisson distribution
d) Binomial distribution
b) standard deviation
A process that exhibits only “common cause” variation is known as:
a) abnormal
b) special
c) unstable
d) stable
d) stable
Which of the following indexes is NOT discussed in Chapter 3?
a) Cp b) Cpl c) Cpk d) Cm
b) Cpl
My Ppk index does not consider any special cause variation. (True/False)
False
If my process is in control, I should (never/always) react to an increase in a common cause variation.
NEVER
