Six Sigma

Question 1

What standard deviation does 6 sigma use

Answer 1

Plus or minus 6 standard deviations

Question 2

The smaller the standard deviation

Answer 2

The smaller variability in the process

Question 3

A process is capable

Answer 3

When natural process capability fits within the specified tolerance

Question 4

Capability index

Answer 4

Less than one index indicates the process is not capable

Question 5

Target capability index

Answer 5

Is 1.33

Question 6

Risky capability case

Answer 6

Equals 1.00

Question 7

DMAIC - 5 phases of improvement process within six sigma

Answer 7

Define
Measure
Analyses
Improve
Control

Question 8

Purpose of DMAIC

Answer 8

Improve cycle time, quality and cost

Question 9

Define consists of

Answer 9

Project charter, process map and voice of the customer

Question 10

Measure consists of

Answer 10

Understanding process, validate the data accuracy and determine the process capability

Question 11

Analyze consists of

Answer 11

Process analysis, cause investigation, charter updating , pinpoint and verify causes affecting the problem

Question 12

Improve consists of

Answer 12

Selects optimal solution, tests a pilot, and implements solutions

Question 13

Control consists of

Answer 13

Evaluating the process, standardizing the procedures and final actions. Objective is to evaluate effectiveness of the improvement

Question 14

Statistics

Answer 14

Science deals with collection, tabulation, analysis, interpretation and presentations of quantitative data

Question 15

Descriptive statistics

Answer 15

Describes characteristics of product or process using info collected on it

Question 16

Inferential statistics

Answer 16

Draws conclusion about the population based on info contained in a sample. Uses probability

Question 17

Attribute data

Answer 17

Can only be whole numbers

Question 18

Variable data

Answer 18

Continuous data. Can be any real numbers. Measured data

Question 19

Precision

Answer 19

Is determined by how reproducible that measurement value is

Question 20

Accuracy

Answer 20

Determined by how close a measured value is to its true value

Question 21

Data described by

Answer 21

Frequency distribution

Measures of central tendency and measures of dispersion

Question 22

Histogram range

Answer 22

5 to 20. No more than 20

Question 23

Mean

Answer 23

Average

Question 24

Median

Answer 24

Middle number

Question 25

Mode

Answer 25

Most frequently

Question 26

Central tendency for bell curves

Answer 26

Positively skewed right graph would be where tail falls off is where skew is

Question 27

Kurtosis

Answer 27

Peakedness of data

Question 28

Sample data

Answer 28

Info obtained from sample can only be used make plausible conclusions about the population not exact statements

Question 29

What does six sigma focus on

Answer 29

Reducing variation, measurement defects and improve quality of products, processes and service