Ken Feldman

Kappa is the common measurement for judging how your measurement system works for attribute data. It is also described as the primary output from an Attribute Agreement Analysis.

Correlation allows you to determine whether sets of data have some sort of relationship. Goodman-Kruskal Gamma looks at pairs of data and determines a correlation. Let’s see how.

Is random variation a good thing or a bad thing? Should I worry about the statistical implications or the practical ones? Let’s find out.

Your customers want to know when they can expect completion of their orders. Little’s Law, or Process Lead Time (PLT), is a simple way to calculate how long an order will take to complete.

Visual Management Boards played a critical role in enabling this company to link and visually display critical metrics, KPIs, and actions simply and consistently. So, what are Visual Management Boards? Today, we’re exploring how these visualization tools can let your company reach new heights. While the company is fictional, the results speak for […]

Have you ever heard your customer ask, “Why does my job take 10 days when there is only 5 days of actual work?” It may be because the Process Cycle Efficiency (PCE) is low, and there is a lot of waste in the process. PCE will help define how much that waste is.

When testing if the means of greater than 2 groups are statistically different you could use a 1-way ANOVA. But, if you have multiple treatment groups, then you can use Dunnett’s 1-way ANOVA.  ANOVA stands for Analysis of Variance. ANOVA is a statistical method used to compare the means of two or more […]

ISO 9000 is a set of international standards that ensures organizations meet the needs of customers and other stakeholders while adhering to statutory and regulatory requirements related to their products and services. It primarily focuses on quality management systems (QMS) and is designed to help organizations ensure they consistently meet customer requirements and […]

Would you and I agree what 50% cotton/50% polyester means if we saw a label on your shirt? Probably not. How about whether your order was delivered? Without good operational definitions, we would likely not agree on many things. Let’s see how we can overcome that gap.

Do I have to pay money to get through my project Tollgate? Of course not, but you do have to stop, evaluate your progress, and make sure you’re still heading in the right direction — and accomplishing the tasks required for each step of your project. 

Your design of experiments (DOE) has many variables and a tight budget. How can you balance the process information you need with the limitations of time and resources? You might try using a screening DOE.

The DMAIC methodology of Six Sigma is a well-known tool for improving existing products and processes. But, what if our existing process or product can’t be improved enough to meet expectations? What if we are developing a process that hasn’t existed before?

The Wilcoxon Rank Sum Test, sometimes called the Mann Whitney Wilcoxon Test or Mann Whitney U test, is used to test whether two independent samples come from the same population or two different populations. 

Cpk is one of the metrics calculated for determining whether a process is capable of meeting customer specifications or requirements. 

Red X is an anti-hero and a former “villain identity” employed by Robin of Batman and Robin fame. No, that’s not right. Red X is really a problem-solving methodology developed by Dorian Shainin. Let’s explore this a little further.

Six Sigma has been defined in three ways: as a metric, a methodology, and a philosophy. Sigma can be defined as the standard deviation of a set of continuous data, so Six Sigma would then be six standard deviations.

You know variation in your process is not a good thing. It negatively impacts predictability and planning. Let’s learn about an easy way to measure variation so you can better understand your process.

As artificial intelligence (AI) continues to reshape industries, organizations are increasingly integrating AI-driven solutions into their continuous improvement programs. AI has the potential to revolutionize these programs by automating repetitive tasks, uncovering patterns in data, and offering predictive insights that can accelerate decision-making. However, AI’s implementation introduces new considerations for businesses aiming to […]

The only acceptable quality level should be zero defects. But that’s not always the case. Let’s learn what an acceptable quality level or limit is all about.

You have probably heard of the acronym PDCA (Deming Cycle) but have you heard of FOCUS PDCA? Read this article and you will understand what it is.

Making data-driven decisions is critical in today’s business environment, but can you trust your measurement system to give you meaningful data? Measurement System Analysis is the tool you need to know whether you can trust your data.

Is assignable cause a bad thing? No, it’s a signal something happened in your process that you didn’t expect. It could be good or bad, but you should find out what happened.

Many statistical tests have underlying assumptions about the population data. But, what happens if you violate those assumptions? This is when you might need to use a non-parametric test to answer your statistical question. Non-parametric refers to a type of statistical analysis that does not make any assumptions about the underlying probability distribution […]

Your customers often ask, “When will I get my widget delivered?” You respond with, “It depends.” If you know your turn-around time, you might be able to provide a better answer. Let’s learn more about turn-around time.