Spaghetti Diagram: Reducing Motion, Transportation and Cycle Time

How do you visualize the flow in a process before and after improvements? The Spaghetti Diagram to the rescue! The concept is basic, but the Spaghetti Diagram is quite useful. What is a Spaghetti Diagram? It is a line diagram superimposed on the process layout in order to map the flow in the steps of [...]

Quality Circles: Overview, Advantages, and Disadvantages

What is a quality circle? What are its advantages and disadvantages? Early starts in Japan and the US. Developments in India and in Healthcare in Europe. Quality Circle: A group of workers who do the same or similar work, meeting regularly to identify, analyze and solve work-related problems. Participation is voluntary, takes place during work [...]

Multivariate Testing (Experimental Design) vs A/B Testing

You may have heard of A/B Testing and Multivariable Testing (Experimental Design) in terms of website optimization to maximize conversions among other goals. What are these testing regimens? When should you use them? A/B testing is just that — testing one configured webpage (A) against another (B) and analyzing which is best. Multivariate testing (MVT) [...]

Readability Statistics

If you are in Quality, Lean, or Six Sigma, you will write procedures. How can you check that your documents are written at a maximum grade level to ensure that everyone can comprehend them as intended? The answer is readability statistics. What are readability statistics? They are formulas that rate your documents and give a [...]

Cleaning Data for Analysis

When you acquire data for analysis, it is highly unlikely that it will be in a form ready to analyze. Experienced data analysts and statisticians know that data preparation or data cleaning is the most time-consuming part of data analysis but incredibly important, otherwise any conclusions drawn from your analysis will be suspect. We’ll explore [...]

Standardized Work: Definition, Role, and Implementation

What is standard or standardized work? What is its role in Lean? Is it difficult to implement? What are some examples? We will use several sources to address these topics in order.  What is standard or standardized work and its role in Lean?  Standard work defined: A precise description of each work activity, specifying cycle [...]

Supply Chain Performance Measurement

A supply chain is defined as the sequence of processes involved in the production and distribution of a commodity. But what is involved in the management and performance measurement of a supply chain? First, what is supply chain management? For that we turn to a video from Wisc-Online, a repository of free high-quality educational learning [...]

The Delphi Method: Uses, Do’s, and Don’ts

Do you have a problem where you need a group of “experts” to reach a consensus, where consensus means a pre-study defined level of agreement? The Delphi Method is one such group technique. But what is it? When should it be used? How is it done? What are some advantages and disadvantages? In order to [...]

2020-07-04T17:37:20+00:00 By |Tags: , , |0 Comments

Dealing with Missing Data

Sooner or later you will encounter missing data in your analyses. Should you ignore it? Should you include it? What is the best way to deal with missing data? In a series of three excellent videos, Rirvik Kharkar, former software engineer and data analyst and currently a master’s student in statistics at UCLA, discusses ways [...]