Six Sigma Green Belt Exam Questions and Answers 2024

Six Sigma - a customer focused, well defined problem solving methodology supported by a handful of powerful analytical tools Continuous Improvement - driven by the execution of carefully selected projects Goal of Six Sigma - to take small steps forward and no steps backward Formal Six Sigma Definition - a business improvement approach that seeks to find and eliminate causes of mistakes or defects in business processes by focusing on process outputs that are of critical importance to customers Who coined "Six Sigma"? - Motorola Sigma Level - measures the capability of the process to perform defect free work; the higher, the better quality Defect - anything that results in customer dissatisfaction Purpose of Six Sigma - to better serve customer needs and expectations thereby providing increasing value to the customers and ensuring repeat business Six Sigma Approach Requirements - 1. Not just statistics, but changes in culture of the organization; 2. A deep commitment from the highest levels of management; 3. A tolerance for endlessly questioning the validity of sacred company beliefs and the traditional ways For Six Sigma to be Effective - 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) Six Sigma Structured Steps - DMAIIC: Define, Measure, Analyze, Improve, Implement, Control Theory of Profound Knowledge - Dr. Deming claims to be essential to for any organization that desired to be competitive in today's marketplace Knowledge of Systems - 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 Knowledge of Variation - 1. Variation is the voice of the system or process; 2. Use statistics to find special and common causes of it; 3. Reducing variation reduces costs When people do not understand variation - 1. See trends where there are no trends; 2. Blame and give credit to others for things over which they have little or no control; 3. Build barriers, decrease morale, and create an atmosphere of fear; 4. Never be able to fully understand past performance, make predictions about the future and make significant improvements in the process Knowledge of Psychology - 1. People want to do a good job, contribute, and have pride and joy in their work; 2. Need to tap into intrinsic motivation; 3. Must drive out fear and build trust Knowledge of Knowledge - Rational prediction requires theory and we build knowledge through systematic revision and comparison of theory based on comparison of prediction with observation Common Cause Variation - refer to situations, usually within those systems and processes that are more ongoing, chronic, and persistent Special Cause Variation - refer to sentinel events, one-time occurrences, or other unique out-of-the-ordinary circumstance Stable Process - normal variation; predictable, in control, have known process capability Control - predictability Basic Theorem of Variation - If you always do what you've always done, you'll always get what you've always got Corollary to the Basic Theorem of Variation - expect a change, requires change Process Monitoring - must know central location, spread, shape, relationship of variation to time Histogram - a graphical representation of data in a bar chart format; used to observe the shape of data 3 standard deviations - contains 99.73 percent of values, represents the expected limits of common cause variation necessary for stable and predictable process Six Sigma Quality - 6 standard deviations in each direction; 3.4 defects per million