# FREE Lean Six Sigma Yellow Belt Certification Basic Questions and Answers

#### A Pareto chart is not required when using a histogram for problem-solving: False or true

The statement is false.

While a histogram and a Pareto chart are related tools that are used to analyze and visualize data, they serve different purposes, and one doesn't necessarily replace the other. Both tools can provide valuable insights during problem-solving, and they often complement each other.

#### Departures from the vertical flow can be viewed as potential areas for improvement: False or true

Potential opportunities for improvement can indeed be seen as deviations from the vertical flow in a process.

In process improvement methodologies, such as Lean and Six Sigma, the concept of "flow" refers to the smooth and efficient movement of work through a process. A vertical flow represents a process that is operating optimally without interruptions, delays, or deviations.

#### The DMAIC process is

The DMAIC method serves as both a problem-solving approach and a structured method for communicating the decision process and recommendations in Lean Six Sigma.

#### What is the title given to a series of Yes/No experiments' discrete probability distribution of the number of successes?

The term given to the discrete probability distribution of the number of successes in a sequence of Yes/No experiments is the "Binomial distribution."

The Binomial distribution is a fundamental probability distribution used to model situations where there are two possible outcomes (usually labeled as "success" and "failure") for each trial or experiment. It's applicable when the trials are independent, the probability of success remains constant across trials, and the trials are carried out a fixed number of times.

#### Which consumer segment is most likely to express concerns about business hours, workplace safety, and other issues?

The operational staff group is most likely to voice requirements about operating hours, health and safety, and working conditions.

Operational staff are the individuals directly involved in carrying out the day-to-day tasks and activities within an organization. They have firsthand experience and knowledge of the operational aspects of the business, including the working conditions, safety concerns, and practical implications of operating hours.

#### Which of the following do we undertake in order to reduce waste through the use of Lean Principles?

Keeping the work area clean and organized is one of the principles of Lean methodology that aims to minimize waste and improve efficiency.

In Lean, this principle is often referred to as "Seiri" or "Sort," which is one of the 5S principles. The 5S principles are fundamental to Lean and focus on creating an organized, clean, and efficient work environment. "Seiri" or "Sort" involves removing unnecessary items from the work area and keeping only the tools, materials, and equipment that are essential for the current tasks.

#### We can actively manage the Q, or outcome measurements, using in-process P measures: False or true

That statement is true. In-process "P" measures enable organizations to proactively control the "Q," or outcome measures.

In the context of process improvement methodologies like Lean and Six Sigma, the concept of using in-process measures ("P" measures) to control and predict end-of-process outcomes ("Q" measures) is fundamental.

#### The histogram is helpful for comprehending the following types of data:

A histogram is indeed useful for understanding and visualizing measurable (continuous) data.

A histogram is a graphical representation of the distribution of data values in a dataset. It divides the data into intervals or "bins" and displays the frequency or count of data points that fall within each bin. Histograms are particularly effective for showing the distribution and characteristics of continuous data, which are data points that can take any value within a certain range.

#### The following should be "drivers" and predictors of in-process measures (Ps):

In the context of process improvement and measurement, in-process measures (Ps) should ideally serve as "drivers" and predictors of end-of-process outcomes measures (Qs).

In the realm of performance measurement and process improvement methodologies such as Lean and Six Sigma, the relationship between in-process measures and end-of-process outcomes is crucial.

#### The five DMAIC steps can be split into two categories:

The 5 DMAIC steps in Lean Six Sigma can be broadly categorized into problem-solving and project management phases. DMAIC stands for Define, Measure, Analyze, Improve, and Control.

#### True or false: When tackling an issue with measurable data, line graphs, histograms, and Pareto charts come naturally.

The natural flow of tools when solving a problem with measurable data often includes using a line graph, histogram, and Pareto chart in a sequential manner. These tools can provide a systematic approach to understanding and analyzing the data.

#### The ___________________ is a tool we employ to find potential flaws (failures) in our procedure and the effects they might have.

FMEA stands for Failure Modes and Effects Analysis, and it is indeed a tool used to identify possible failures (defects) in a process, product, or system, and to assess the potential impact of those failures.

#### Separating the important few Xs from the unnecessary many Xs is one of the main goals of creating an X-Y diagram.

One of the primary objectives of constructing an X-Y Diagram is indeed to separate the vital few X's from the trivial many X's.

An X-Y Diagram, also known as an XY Scatter Plot or Scatter Diagram, is a graphical tool used in process improvement methodologies like Six Sigma. It involves plotting data points on a graph with two axes (X and Y) to visually analyze the relationship between two variables. The X-axis typically represents the input or independent variable, while the Y-axis represents the output or dependent variable.

#### Data analysis and presentation so we may make educated decisions about what is happening in our process are the goals of ________.

The purpose of using basic statistics is indeed to analyze data and present it in a way that enables informed decision-making about what is happening in a process.

Basic statistics involve fundamental techniques for summarizing, describing, and analyzing data to extract meaningful insights. These techniques help organizations understand the characteristics of their processes, identify patterns, trends, variations, and anomalies, and make informed decisions based on data-driven evidence.

#### Those in mid-level management and above should be the only ones to use the 5S technique in lean: False or true

The 5S method in Lean can and should be applied by employees at all levels within an organization, not just mid-level management and above.

#### Process Control Systems can improve organizational competence and compliance by standardizing processes: False or true

The standardization of processes using Process Control Systems can indeed enhance compliance and organizational capability.

Process Control Systems (PCS) are tools and techniques used to monitor, control, and optimize processes within an organization. Standardization refers to the practice of establishing consistent processes, procedures, and practices that are followed across the organization. When combined, the use of Process Control Systems and process standardization can lead to several benefits: