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Home » Articles » on Tools & Techniques » Institute of Quality & Reliability » Page 2

Institute of Quality & Reliability

Institute of Quality and Reliability (IQR) was established in Nov. 2005, with primary objective to help Industries for improving their quality and business performance. IQR also supports individuals aspiring to improve their knowledge and skills in Quality and Reliability.


This article series (videos) is dedicated to all those who want to learn and contribute to quality and reliability improvement to make this world better! Videos are created by Hemant Urdhwareshe and team. Hemant is a Fellow of American Society for Quality (ASQ) and is certified by ASQ as Six Sigma Master Black Belt, Reliability Engineer (CRE), Quality Manager (CMQ/OE) and Quality Engineer (CQE). He has 42 years of experience and wants to share his knowledge and experience with those who wish to acquire it!

by Hemant Urdhwareshe Leave a Comment

Response Surface Designs: Part-1 Addition of Centerpoint

Response Surface Designs: Part-1 Addition of Centerpoint

Dear friends, I am posting a video after some gap! This is our first video in our series on Response Surface Designs. Response Surface Designs become necessary when we want to model a second order response in an experiment. In this first video, Hemant Urdhwareshe explains addition of centerpoint to a factorial design to assess presence of non-linearity in the response. The concept is explained with a virtual catapult with a two-factor two-level design.

Links to the related videos:

(1) DOE-1: Introduction to Design of Experiments

(2) DOE-8: Linearity and Orthogonality in Experimental Design

(3) DOE-6: Case Study in Creating Full Factorial Design in Minitab

(4) DOE-7: Analyse Factorial Design with Minitab

[Read more…]

Filed Under: Articles, Institute of Quality & Reliability, on Tools & Techniques

by Hemant Urdhwareshe Leave a Comment

SPC-2: Proportion Defective and Number Defective charts (p and np charts)

SPC-2: Proportion Defective and Number Defective charts (p and np charts)

Dear friends, we are happy to release this second video on statistical process control charts. In this video, Hemant Urdhwareshe illustrates how to use attributes charts, specifically p-charts for proportion defective and np charts for number defective! Watch our video SPC-1 for Introduction and Selection of Control Charts, and X-bar and R charts.

[Read more…]

Filed Under: Articles, Institute of Quality & Reliability, on Tools & Techniques

by Hemant Urdhwareshe Leave a Comment

SPC-1: Statistical Process Control Chart Selection, and Application Example on Excel

SPC-1: Statistical Process Control Chart Selection, and Application Example on Excel

Dear friends, Institute of Quality and Reliability (IQR) is happy to release this first video in our series on statistical process control charts. In the video, Hemant Urdhwareshe, Director of IQR and Fellow of ASQ explains criteria for selection of control charts, and has illustrated how to plot X-bar and Range chart using Microsoft Excel with an application example. Hemant has also explained briefly the interpretation rules to detect special causes. The video is little long but request viewers to watch it till end for best viewing experience.

[Read more…]

Filed Under: Articles, Institute of Quality & Reliability, on Tools & Techniques

by Hemant Urdhwareshe Leave a Comment

Fractional Factorial Design with Center Point: Design and Analysis

Fractional Factorial Design with Center Point: Design and Analysis

Dear friends, we are happy to release this video on fractional factorial design. In this video, Hemant Urdhwareshe has illustrated how to create a five-factor resolution-V design in Minitab (version 17) with an example of a virtual catapult (thanks to sigmazone.com)

[Read more…]

Filed Under: Articles, Institute of Quality & Reliability, on Tools & Techniques

by Hemant Urdhwareshe 1 Comment

Reliability Estimation with Kaplan-Meier Nonparametric Method

Reliability Estimation with Kaplan-Meier Nonparametric Method

Hello Friends! I am happy to release this video on Kaplan-Meier (KM) nonparametric method to estimate reliability. The KM method is used in situations when the data cannot be modelled using mathematical distributions such as Weibull, Lognormal etc. The KM method is popularly used in medical science to estimate survival probabilities of patients with diseases such as cancer, kidney diseases, etc.

[Read more…]

Filed Under: Articles, Institute of Quality & Reliability, on Tools & Techniques

by Hemant Urdhwareshe Leave a Comment

Covid-19 RT-PCR Test, Confusion Matrix and International Travel

Covid-19 RT-PCR Test, Confusion Matrix and International Travel

Dear friends, This is Hemant Urdhwareshe! I am uploading this video, which is different from our other videos! In this video, I have explained the “Confusion Matrix” and related terms such as Sensitivity, Specificity, Accuracy with reference to RT-PCR Test to detect Covid-19 infection. I and my son were isolated for Covid-19 as I was detected Covid-19 positive before my return travel and then isolated for about a fortnight in Egypt! This video is a result of my experience and review of travel rules! I am sure you will find this interesting and thought-provoking!

[Read more…]

Filed Under: Articles, Institute of Quality & Reliability, on Tools & Techniques

by Hemant Urdhwareshe Leave a Comment

Sample Size and Power In Hypothesis Testing

Sample Size and Power In Hypothesis Testing

Concepts and Application with Minitab Software

Institute of Quality and Reliability is happy to release this video on Power and Sample Size in the context of hypothesis testing. The video also contains application examples of power and sample size calculation for one-sample z-test using Minitab software.

[Read more…]

Filed Under: Articles, Institute of Quality & Reliability, on Tools & Techniques

by Hemant Urdhwareshe Leave a Comment

Confidence Intervals (Part 3) for Proportion and Standard Deviation

Dear friends, We are happy to release this third video in our series on Confidence Intervals! In this video, Hemant Urdhwareshe has explained how to determine confidence intervals for population proportion and standard deviation with day-today application examples! Hemant has also illustrated use of templates for quick calculation!

Links to other related videos:

Confidence Interval (Part-1) for Mean (Sigma Known)

Confidence Interval (Part-2) for Mean (Sigma unknown)

Chi-square Distribution

Chi-square Test of One Variance

Filed Under: Articles, Institute of Quality & Reliability, on Tools & Techniques

by Hemant Urdhwareshe Leave a Comment

Confidence Intervals for Mean ( part-2:) : Using t-distribution

Dear friends, we are happy to release this Part-2 of our videos on Confidence Intervals. In this video, Hemant Urdhwareshe explains how to estimate confidence interval of population mean when population standard deviation sigma is not known In such cases, we need to use Student’s t-distribution instead of normal distribution and Z-Score.

[Read more…]

Filed Under: Articles, Institute of Quality & Reliability, on Tools & Techniques

by Hemant Urdhwareshe Leave a Comment

Confidence Interval of Population Mean (Part-1)

Dear friends, we are happy to release this video on confidence interval when population standard deviation is known. This is part-1 of our series on confidence intervals.

[Read more…]

Filed Under: Articles, Institute of Quality & Reliability, on Tools & Techniques

by Hemant Urdhwareshe Leave a Comment

Exponential Probability Plotting on Excel

Dear friends, we are glad to release this interesting video. In this video, Hemant Urdhwareshe explains procedure for probability plotting of failure data in Exponential Distribution using Excel. Hemant is a Fellow of ASQ and is certified as CRE, Six Sigma Master Black Belt, CQE and CMQ/OE by ASQ.

[Read more…]

Filed Under: Articles, Institute of Quality & Reliability, on Tools & Techniques

by Hemant Urdhwareshe Leave a Comment

Remember this Memoryless Exponential Distribution!

Remember this Memoryless Exponential Distribution!

Dear friends, I am happy to release our 59th video on Exponential Distribution! Exponential Distribution is an appropriate mathematical model when failure or hazard rate is constant. It is often known as “Memoryless” as reliability in any time interval is same! Exponential Distribution has many applications in Reliability Engineering such as electronic components. Many reliability procedures in MIL Standards assume constant failure rate and Exponential Distribution! Hope you find the video interesting and useful! Your feedback is welcome! Do subscribe to our channel to get updates on our new videos and programs!

[Read more…]

Filed Under: Articles, Institute of Quality & Reliability, on Tools & Techniques

by Hemant Urdhwareshe Leave a Comment

Accelerated Life Testing (ALT) Part-4 Determination of Activation Energy for Arrhenius Model

Accelerated Life Testing (ALT) Part-4 Determination of Activation Energy for Arrhenius Model

Dear All, This is our fourth video on Accelerated Life Testing (ALT). Some of the viewers had requested for procedure to determine the Activation Energy used in Arrhenius Model. This video explains experimental procedure to determine Activation Energy. Hope you find this useful! If you like the video, click on the “Thumbs-up icon” and subscribe to our channel for more videos on Quality and Reliability!

[Read more…]

Filed Under: Articles, Institute of Quality & Reliability, on Tools & Techniques

by Hemant Urdhwareshe Leave a Comment

ANOVA Part-2: Partitioning Sum of Squares

ANOVA Part-2: Partitioning Sum of Squares

Institute of Quality and Reliability is happy to release this second video on ANOVA! Viewers need to watch our video ANOVA Part-1 before watching this video. In this video, Hemant Urdhwareshe explains One-way ANOVA calculations using Sum of Squares on Excel. Hemant is a Fellow of ASQ and is certified by ASQ as Six Sigma Master Black Belt, CQE, CRE and CMQ/OE.

[Read more…]

Filed Under: Articles, Institute of Quality & Reliability, on Tools & Techniques

by Hemant Urdhwareshe Leave a Comment

ANOVA Part-1 Introduction, Concepts, and F-Test

ANOVA Part-1 Introduction, Concepts, and F-Test

Institute of Quality and Reliability (IQR) is happy to release this first video on Analysis of Variance (ANOVA). In this video, Hemant Urdhwareshe, Director of IQR and Fellow of ASQ, explains basic concepts of ANOVA and F-test of equal variances.

[Read more…]

Filed Under: Articles, Institute of Quality & Reliability, on Tools & Techniques

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