Part 1 - Answer-Intro
What is Six Sigma? - Answer-- Customer Focused
- Well defined problem solving methodology supported by a handful of powerful analytical tools.
- coined by Motorola
Continuous Improvement - Answer-- driven by the execution of carefully selected projects.
- small steps ...
IISE Green Belt Exam Questions and
Answers 2024
Part 1 - Answer-Intro
What is Six Sigma? - Answer-- Customer Focused
- Well defined problem solving methodology supported by a handful of powerful
analytical tools.
- coined by Motorola
Continuous Improvement - Answer-- driven by the execution of carefully selected
projects.
- small steps forward no steps backward
Defect - Answer-- anything that results in customer dissatisfaction
Six Sigma Approach - Answer-- Uses statistics solely as tools for interpreting and
clarifying data
- Requires a deep commitment from the highest levels of management
- strategy and not a destination
For Six Sigma to be Effective - Answer-1. There must be a process in place;
2. The process must be brought into control statistically;
3. The processes must be improved (by reducing variation within the controlled
processes and bringing them closer to the target)
DMAIIC - Answer-- define
- measure
- analyze
- improve
- implement
- control (standardize and validate)
Part 2 - Answer-Variation
Who done it (Variation) - Answer-W. Edward Deming
(Theory of Profound Knowledge)
Knowledge of Systems - Answer-1. A system is a network of interdependent
components that work together to try to accomplish an aim;
2. Systems are management's responsibility;
3. Management's job is to optimize the entire system over time
Variation - Answer-- the voice of the system or process
, - make invisible visible
- distinguish between special and common cause variation
When people do not understand variation - Answer-- See trends where there are no
trends;
- Blame and give credit to others for things over which they have little or no control;
- Build barriers, decrease morale, and create an atmosphere of fear;
- Never be able to fully understand past performance, make predictions about the future
and make significant improvements in the process
Types of variation - Answer-common cause - process is in control
special cause - process is out of control (address 1st)
Stable process - Answer-- only normal variation is present (no special cause)
- predictable
- in statistical control
- known process capability (can it meet customer requirements)
Control - Answer-predictability
Basic Theorem of Variation - Answer-If you always do what you've always done, you'll
always get what you've always got
Part 3 - Answer-Statistics
Sample vs. Population - Answer-Sample - english
Population - greek
Which Mean do you Mean? - Answer-- Use the median or the mode if the shape of the
distribution is not symmetrical
- Use the arithmetic mean if the shape of the distribution is symmetrical
Standard Deviation - Answer-
standard deviation significance
within 1,2,3 - Answer-1σ - 68%
2σ - 95.5%
3σ - 99.73%
Box and Whisker Plot: Five-number summary - Answer-the minimum, the maximum, the
sample median, and the first and third quartiles.
Part 4 - Answer-Control Charts
Control Charts - Answer-- Statistical tool which shows the amount and type of variation
present in any process that is being monitored
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