1
CM Lean Certification Course Questions with
Correct Answers | Updated (100% Correct
Answers)
What is Variation? Answer: Variation refers to the fluctuations in the
process and results from the pre-determined standards
What has a corrupting effect on the reliable workflow of production
operations? Answer: Variation
What is another name for External Sources of Variation? Answer:
Special Cause Variation
What are some types of External Source or Special Cause Variations?
Answer: Environmental Conditions, Equipment Breakdown, Material
Delivery Interruptions, Delays in Submittals, Design Errors
What is another name for Internal Sources of Variation? Answer:
Common Cause Variation
What are some types of Internal Source or Common Cause
Variations? Answer: Individual Crew's Performance, Motivation
Levels, Safe Work Practices, Experience Level, Following Inconsistent
processes
© 2025 All rights reserved
, 2
What must we do with variation in order to have consistent
workflow on the job? Answer: We must identify the sources of
variation and take steps to eliminate them
What is one recommended step of eliminating or reducing
variation? Answer: Standardization of Work Processes
Important Concept: What is Work In Progress (WIP)? Answer: The
amount of work in the production process at a given time
Important Concept: What is Throughput? Answer: The amount of
finished material/product coming out of the production process in a
given amount of time and is the real measure of speed in the
system
Important Concept: What is Cycle Time? Answer: The time it takes
to complete one finished unit of a process
A random or non-random difference in a production process that
we can measure and quantify is ____________. Answer: Variation
All _______________ _________________ exhibit variation. Answer:
Production Processes
_____________ _________ ______________ is an inherently random source
of variation that is property of the process or the procedure.
Answer: Common Course Variation
© 2025 All rights reserved
CM Lean Certification Course Questions with
Correct Answers | Updated (100% Correct
Answers)
What is Variation? Answer: Variation refers to the fluctuations in the
process and results from the pre-determined standards
What has a corrupting effect on the reliable workflow of production
operations? Answer: Variation
What is another name for External Sources of Variation? Answer:
Special Cause Variation
What are some types of External Source or Special Cause Variations?
Answer: Environmental Conditions, Equipment Breakdown, Material
Delivery Interruptions, Delays in Submittals, Design Errors
What is another name for Internal Sources of Variation? Answer:
Common Cause Variation
What are some types of Internal Source or Common Cause
Variations? Answer: Individual Crew's Performance, Motivation
Levels, Safe Work Practices, Experience Level, Following Inconsistent
processes
© 2025 All rights reserved
, 2
What must we do with variation in order to have consistent
workflow on the job? Answer: We must identify the sources of
variation and take steps to eliminate them
What is one recommended step of eliminating or reducing
variation? Answer: Standardization of Work Processes
Important Concept: What is Work In Progress (WIP)? Answer: The
amount of work in the production process at a given time
Important Concept: What is Throughput? Answer: The amount of
finished material/product coming out of the production process in a
given amount of time and is the real measure of speed in the
system
Important Concept: What is Cycle Time? Answer: The time it takes
to complete one finished unit of a process
A random or non-random difference in a production process that
we can measure and quantify is ____________. Answer: Variation
All _______________ _________________ exhibit variation. Answer:
Production Processes
_____________ _________ ______________ is an inherently random source
of variation that is property of the process or the procedure.
Answer: Common Course Variation
© 2025 All rights reserved
