Harish Jose

Harish’s Notebook

Harish Jose has more than seven years of experience in the medical device field. He is a graduate of the University of Missouri-Rolla, where he obtained a master’s degree in manufacturing engineering and published two articles. Jose is an ASQ member with multiple ASQ certifications, including Quality Engineer, Six Sigma Black Belt, and Reliability Engineer. He is a subject-matter expert in lean, data science, database programming, and industrial experiments, and publishes frequently on his blog, Harish’s Notebook.

Wed, 01/28/2026 - 12:01
Deriving the Success Run Theorem Any statistical statement we make should reflect our lack of knowledge
Mon, 08/28/2023 - 12:03
The success run theorem is one of the most common statistical rationales for sample sizes used for attribute data. It goes in the form of: Having zero failures out of 22 samples, we can be 90% confident that the process is at least 90% reliable (or…
OC Curve and Reliability/Confidence Sample Sizes Using OC curves to generate reliability/confidence values
Wed, 05/24/2023 - 12:03
I’m looking at a topic in statistics. I’ve had a lot of feedback on one of my earlier posts on OC curves and how one can use them to generate a reliability/confidence statement based on sample size (n), and rejects (c). I provided an Excel…
Deconstructing Systems There is nothing outside the text
Wed, 04/26/2023 - 12:03
I’m looking at ideas of the famous Algerian-French philosopher, Jacques Derrida, often described as a post-structuralist. His most famous idea is deconstruction, often associated with analyzing literary works. A text is presented as a coherent whole…
Being in the Ohno Circle Learning how to better ask “Why?”
Mon, 09/12/2022 - 12:03
In today’s column, I’m looking at the Ohno Circle in light of German philosopher Martin Heidegger’s ideas. I’ll try to stay away from the neologisms used by Heidegger and will only scratch the surface of his deep insights. One of the best…
A System Is Designed to Do Exactly What It Does, Or... A constructivist’s view of POSIWID
Wed, 05/04/2022 - 12:03
T he dictum, “purpose of a system is what it does” (POSWID) is famous in cybernetics, attributed to the management cybernetician Stafford Beer. Beer notes: “A good observer will impute the purpose of the system from its actions and thus from the…
TPS’s Operational Paradox A quest for ultimate efficiency
Mon, 07/19/2021 - 12:03
Recently, I came across an interesting insight at Toyota’s website. I was taken aback by the first sentence of this paragraph: “Eventually, the value added by the line’s human operators disappears.” The complete paragraph is shown below:
“…
Observing With Your Hands A neurological approach to knowledge retention
Thu, 04/22/2021 - 12:03
Today I’m looking at the ideas inspired by mirror neurons. Mirror neurons are a class of neurons that activate when someone engages in an activity, or when they observe the same activity being performed by someone else. The phenomenon was first…
The Toyota House Why jidoka and JIT?
Mon, 10/19/2020 - 12:03
Today I’m looking at the “house” of the Toyota Production System (TPS). The illustration below shows the two pillars of the TPS house, jidoka and just in time (JIT). I’ve been thinking about why jidoka and JIT are the two pillars, and why they’re…
Shingo’s Whys The next logical step in complexity
Thu, 07/02/2020 - 12:03
Shigeo Shingo is one of my heroes in industrial engineering. He had a great mind that thrived on curiosity. Today I am looking at Shingo’s Whys. This is in contrast to Taiichi Ohno’s 5 Whys method. Ohno’s 5 Whys method is one of the tools in Toyota…
Wu Wei at the Gemba No force necessary
Thu, 04/02/2020 - 12:02
In today’s column, I am looking at wu wei, which is an important concept detailed in the Chinese classic text, Tao Te Ching. This term is generally translated into English as wu = no, wei = action, or no action. There are other similar concepts in…