Your Reliability Engineering Professional Development Site
A listing in reverse chronological order of articles by:
In manufacturing, variation is the enemy of quality. Left unchecked, it erodes reliability, increases waste, and drives up costs. One of the simplest but most effective tools for controlling variation is Layered Process Auditing (LPA).
[Read more…]
Ongoing Reliability Testing (ORT) is a way to estimate reliability function, as a function of independent variables, primarily age. This is because reliability is “the probability of successful function to specified ages under specified conditions” [O’Connor et al.].
Think of planning ORT as a design of an experiment (DoE). A DoE objective is to quantify effects of factors (independent variables) on the dependent variable, the reliability function. (The reliability and failure rate functions contain the same information, because reliability = P[Life > t] = exp[–∫a(u)du], where a(u) denotes the failure rate function and the integral runs from 0 to t.)
[Read more…]
Dear friends, we are happy to release this video on Process Capability. this is our 93rd video! In this video, Hemant Urdhwareshe, Fellow of ASQ, explains the basic concepts of process capability indices Cp and Cpk with an illustrative example. Hemant has also explained how to validate whether the data is normally distributed with histogram and normal probability plotting. Hemant has further explained the interpretation of the results of study and suggested improvement actions.
[Read more…]
Dear friends, this is a quick overview of the Design for Relliability (DFR) strategy.
For details of the tools and techniques shown in the video, we are providing links to our videos Links to some related videos:
[Read more…]Of the many constructive soft skills, active listening is surely one of the most helpful in the design thinking process. More than just listening to collect information, active listening is a mindset that fosters empathy for the speaker. In business and engineering, it’s our customer that’s speaking. Active listening seeks to understand not only the other person’s words, but also their attitudes and motivations.
For many people, even the idea of “being a better listener” seems ludicrous. Once you’re listening, how can you listen better? It’s like swallowing better or breathing better. [But the truth is, you can.] Even the best listeners periodically fall into a handful of traps that obstruct their understanding of their employer’s, customer’s, and loved one’s words.
[Read more…]
Dear friends, we are happy to release our 91st technical video on XOR Gate occasionally used in Fault Tree Analysis (FTA). In this video, Hemant Urdhwareshe, Fellow of ASQ, explains the basic concept of XOR gate, the related probability calculation and an illustrative example.
[Read more…]
An Interview with James Blackwell, CTO and Co-founder of Roost Inc.
James Blackwell is a wireless industry veteran with over 25 years of leadership experience in the design and manufacturing of Bluetooth and Wi-Fi systems, including CSR and Ozmo Devices.
“Always remember, your focus determines your reality” – George Lucas
In this article, I will outline how to evaluate an FMEA against the FMEA Quality Objective for identifying special characteristics. Special characteristics are often not well understood by FMEA teams, and yet have potential to be highly useful in FMEA applications.
Dear friends, we are happy to release our 90th technical video! In this video, Hemant Urdhwareshe, Fellow of American Society for Quality (ASQ), explains the various functions in reliability mathematics. Hemant has explained Probability Density Function (PDF), Cumulative Failure Distribution Function (CDF), Reliability Function and the Hazard Function. Hemant has also briefly explained the mathematical derivations of these functions as well as their relationships. In addition, the video includes an application example of estimating B02 life when the hazard function is known. The video is little long, so viewers are requested to be patient and watch the complete video. This will be very useful in preparing for the Certified Reliability Engineer Exam conducted by ASQ.
[Read more…]
Many companies, especially for high-complexity products such as energy storage and robotics, are moving away from outsourced manufacturing to establish their own internal operations. In fact, Kearney’s 10th Annual Reshoring Index finds that reshoring has substantially increased during the past decade.
This paradigm shift, driven by the need for closer design and production integration, poses opportunities and challenges. This article delves into the essential steps and considerations to set up an effective internal manufacturing facility tailored for the hardware-based product industry.
[Read more…]
Dear friends, we are happy to release our 89th technical video. In this video, Hemant Urdhwareshe explains the basic idea behind Goodness of fit testes and how to perform Goodness of Fit test. Hemant illustrates this with an illustration of Goodness of Fit test for Normal Distribution using Microsoft Excel. Hemant is a Fellow of ASQ and is certified by ASQ as Six Sigma Master Black Belt, Quality Engineer (CQE), Quality Manager (CMQ/OE) and Reliability Engineer (CRE).
[Read more…]
In the fast-paced world of technology and manufacturing, one of the biggest challenges hardware companies face is managing New Product Introduction (NPI) processes. A common misconception is that simply applying an Agile template used in software production to hardware production will solve all problems, but without thoughtful consideration, it’s a recipe for disaster. Whether it’s waiting weeks for a crucial part, revising designs after production has started, or dealing with field failures, these common pitfalls can lead to big delays, increased costs, and, ultimately, unhappy customers. This blog will dive into some of these common challenges, offering insight and strategies to avoid getting caught in a never-ending cycle of fixing and delaying.
[Read more…]
Dear friends, we are pleased to released our 88th technical video on a very important topic in Statistical Quality Control and Six Sigma: Normal Probability Plotting! In this video, Hemant Urdhwareshe explains the concepts and basic procedure of Normal Probability Plotting using probability paper with a simple real life case study! Hemant is a Fellow of ASQ and is certified by ASQ as Six Sigma Master Black Belt (CMBB), Black Belt (CSSBB), Quality Manager (CMQ/OE), Quality Engineer (CQE) and Reliability Engineer (CRE)!
[Read more…]
Imagine product or part lifetime as the service time in a self-service system. Suppose you could observe periodic input and output counts of that self-service system, without identifying individual service times. How would you estimate the service time distribution without following individual products or parts from input to output? The maximum likelihood reliability estimator for an M/G/Infinity self-service-time distribution function from “ships” (inputs) and “returns” (outputs) counts also works for nonstationary arrival process M(t)/G/Infinity self-service systems, under a condition! A constant or increasing arrival (inputs or ships) rate satisfies the condition. If you identify returns by failure mode then you could estimate make nonparametric estimates of field reliability by failure mode and quantify reliability growth, without life data, if the condition is satisfied.
[Read more…]
In the world of hardware new product introduction, a broken process can have severe consequences, jeopardizing the success of a product launch and hurting the reputation of a company. So, it is crucial to understand the warning signs that a process is disfunctional. Whether it’s slipping schedules, exceeding budgets, or missing requirements, recognizing the signs allows teams to intervene in time.
Learn the ten warning signs and understand the potential impacts they can have on your product launch. By familiarizing yourself with these signs, you can take proactive measures to address them before they escalate into more significant problems.
[Read more…]