Your Reliability Engineering Professional Development Site
Find all articles across all article series listed in reverse chronological order.
A one-sample t-test is a statistical test to determine if the sample mean differs significantly from a known or hypothesized population mean (expected value). It is commonly used when we have a single sample and want to compare its average to an expected value.
[Read more…]
Accelerated life testing (ALT) is a method used to enhance product reliability by subjecting prototypes to stress levels significantly higher than those encountered in actual use.
By increasing the stress on the component, failure is induced more rapidly, which is equivalent to speeding up the passage of time. This approach is particularly useful when waiting for failures to occur at their normal rate is not feasible, such as when a manufacturer needs to release a product to the market soon and cannot afford to spend several years performing a reliability test.
[Read more…]
Yes…is that a ‘yes’ in that something is correct and there is affirmation of acceptance? Or is it “yes?” in response to having one’s attention attracted, or “yes?” as a question as to how something should be done or “yes” affirming one’s agreement regarding a decision on a particular course of action. Not all yeses mean the same.
How often though do we hear the word ‘yes’ and assume it’s what we would like it to mean. Many take ‘yes’ to mean that there is agreement with what has been said and a positive alignment with their way of thinking or writing and the course of action to be taken. But that’s not entirely so.
[Read more…]
Dear friends, In this video, Hemant Urdhwareshe explains the concepts of linearity, center point and orthogonality in Experimental Designs! The video is created to understand these concepts with simple illustrations! We are sure, you will find this video useful!
[Read more…]
Your views on why enterprise asset management fails intrigued me. I am currently undertaking a master’s study on “Understanding the Difficulties of Developing an Effective Planned Preventive Maintenance Regime at an underground coal mine”.
My masters is based on finding the reasons why in the mining field the other methods of maintenance methodologies such as RCM, TPM, Six Sigma, etc. do not seem to get embraced by the mining maintenance teams, and there is always a weak attempt to implement them on the part of management.
[Read more…]
In this video, I’ll walk you through the essentials of preventive maintenance – what it is and how to correctly identify the intervals for preventive maintenance tasks. We’ll talk about scheduled replacement and scheduled restoration tasks, and I’ll take you along as I perform three real-life examples: changing my home HVAC filter, getting my hair colored, and an oil change for my Subaru Forester. Each task highlights the importance of scheduling based on “age,” regardless of the condition at the time.
I also explain why preventive maintenance intervals should be set based on the useful life and not manufacturer recommendations, mean time between failures (MTBF), or criticality. Understanding these concepts is key to building a strong Reliability Culture in any organization. If you have any questions about preventive maintenance, drop them in the comments. I’m here to help!
[Read more…]
In the dynamic world of modern manufacturing and industrial processes, the reliability and performance of equipment play a crucial role in ensuring operational efficiency and product quality. Dosing pumps, essential for precise fluid control, are no exception. As industries increasingly embrace digital transformation, predictive analytics has emerged as a powerful tool to enhance the monitoring and maintenance of dosing pumps. This article delves into how predictive analytics can be used to monitor dosing pump performance, improving reliability, efficiency, and cost-effectiveness.
[Read more…]
In my previous article, I briefly discussed the survival function and the Kaplan Meier method of estimating this function from a given dataset. We applied this method to a vehicle shock absorber dataset to answer questions like “What is the probability that a vehicle shock absorber will last at least 19,000 km?”. The two different modes of failure of a shock absorber (Mode 1 and Mode 2) were ignored and were treated as the same type of failure. In the following post, we will consider the two modes of failures as two competing risks and answer questions like:
“What is the probability that a vehicle shock absorber will experience a Mode 1 failure by 19,000 km and that this failure occurs before it experiences a Mode 2 failure?” [Read more…]
A short video defining accelerated life testing or ALT.
An introduction to ALT or accelerated life testing. ALT is a method used to enhance product reliability by subjecting prototypes to stress levels significantly higher than those encountered in actual use. In short, it’s a way to accelerate time.
[Read more…]
This is a question someone posted to Quora and the system prompted me to answer it, which I did.
This question is part of the general question around which software tools do you use for specific situations. First, my response to the question. [Read more…]
Successful Wind Turbine Reliability Strategy Requires Proactive Removal of the Causes of Failure
The reliability assessment of wind turbine models is critical when making investment in wind technology. Issues to address include: corrosion, metallurgy, structural integrity, reliability, pressure vessel construction, electrical circuits, communication networks, and more.
Develop a life cycle wind turbine reliability strategy that minimizes operationg costs by maximizing component reliability.
[Read more…]
In the previous article we discussed Waterfall, WaterScrumFall, big-A Agile and business agility. Dissonance abounds among organizations struggling to transition their approaches to building solutions and maintaining their existing legacy infrastructures while remaking how they evolve themselves. In attempting to navigate this they often adopt approaches that are destined not to really get them where they need to be.
[Read more…]
In this insightful video, we delve deep into the world of Predictive Maintenance and unravel why it’s an absolute game-changer for modern businesses.
Discover:
Dear friends, Hemant Urdhwareshe explains concepts of statistical degrees of freedom and replication in Design of Experiments (DOE). Hope you find this interesting and useful.
[Read more…]
𝗗𝗮𝘆 𝟭 of my 𝟭𝟬𝟬 𝗗𝗮𝘆𝘀 𝗼𝗳 𝗥𝗲𝗹𝗶𝗮𝗯𝗶𝗹𝗶𝘁𝘆 𝗖𝗵𝗮𝗹𝗹𝗲𝗻𝗴𝗲 is here! We’re starting with how the 𝗰𝗵𝗼𝗶𝗰𝗲𝘀 we make as asset custodians directly impact our equipment 𝗥𝗲𝗹𝗶𝗮𝗯𝗶𝗹𝗶𝘁𝘆. Let’s build a strong foundation together!
Republishing here one week at a time.
[Read more…]
