Blog - Accendo Reliability

Capital Asset Management: Setup — part 2

The rest of us are missing the boat!

RCM has two potential uses – to set you up for success or to regain success from the jaws of failure.
Regardless of when you use it though, RCM alone isn’t enough to get all the benefits. Applying it after the systems are in service, to recover shortfalls in performance, and then failing to follow up on RCM’s results only delivers part of the benefit. That’s where the aircraft and nuclear industries and the military have it right – they take those extra needed steps. The rest of us don’t! [Read more…]

by Greg Hutchins Leave a Comment

Space Tourism

Guest Post by Paul Kostek (first posted on CERM ® RISK INSIGHTS – reposted here with permission)

After writing several articles about topics related to medical devices and big data, thought I’d explore a new area, risk and space tourism.

Though I will include one interesting note about medical devices, on the October 20^th episode of 60 Minutes former VP Dick Cheney admitted that he had the external programming capability for his defibrillator turned off to prevent it from being hacked. So, even as people question the possibility of this occurring we have a real world example of the steps taken to prevent this from happening. Think risk mitigation. [Read more…]

by Mike Sondalini Leave a Comment

Preventative Maintenance Stops Breakdowns

Preventative maintenance stops breakdowns. Preventative Maintenance requires people to regularly walk around looking, feeling, listening, smelling (sometimes even tasting) and thinking about their equipment’s operating condition. The three foundations of classical Preventative Maintenance are regular lubrication checks, drive train monitoring and equipment mounting inspections.

Keywords: work order, inspection, watchkeeping, CMMS, computerised maintenance management system. [Read more…]

by Fred Schenkelberg 22 Comments

Temperature & Humidity Accelerated Life Testing

Peck’s Relationship

High temperature & humidity is a common test condition. For specific failure mechanisms, there are models available (or you can create a model) to determine the translation from test to use conditions.

These acceleration models generally only apply to one specific failure mechanisms and do not apply to a system level estimate of life. If the failure mechanism is the dominant failure mechanism for the product, then an ALT exploring just that mechanisms would provide a life estimate.

Peck’s relationship is an acceleration model for the effect of humidity on the metallization elements of integrated circuits within plastic enclosures (typically an epoxy over molding). [Read more…]

by Kevin Stewart Leave a Comment

Characteristic 2 of an RCA Program

A Plan to Provide Program Resources

Who

Sometimes we get so used to managing without things that it becomes the way things are done. An astronaut giving a presentation at a conference I attended referred to this as “normalization of deviance.” In other words, we get so used to the way things are, that either right or wrong, they become the norm! Unfortunately, the obvious is many times ignored – because it is obvious. If you intend to have a sustainable Root Cause Analysis program, then there are things that must be done. People must be trained, reports must be written, analyses must be performed, and progress must be tracked and reported. Until a program becomes self-sustainable, it must continue to be driven. [Read more…]

by Dennis Craggs 1 Comment

Analysis of Continuous Variables

Telematics data analysis can be used to improve our understanding of how people use their vehicles. It is an objective source to validate product requirements. In cars and trucks, sensor signals are read by electronic modules share the data on a CAN bus. Some signals contain data for continuous variables. Some examples of continuous variables are vehicle speed, engine speed, engine torque, ambient temperatures, in-vehicle temperatures, pressures, voltages, and the battery state of charge. Another name for the continuous variables is parametric data. This CAN data is a rich source of information

[Read more…]

by Fred Schenkelberg Leave a Comment

The Case of Drones

Guest post by Dr. Amir Segal & Yizhak Bot of BQR

Introduction

Reliability engineers are equipped with an arsenal of techniques (FTA, RBD, Markov, FMEA / FMECA, SIL) for reliability, availability, safety and maintainability analysis. However, it is not always clear when to use each technique.
In order to design a safe and reliable product, reliability engineering techniques should be integrated with the system design process. This fact is well known, and today many system engineering conferences include discussions regarding reliability and safety [1,2]. [Read more…]

by Doug Plucknette Leave a Comment

10 Things You Can Do To Get More Enjoyment Out of Business Travel

Several weeks ago, I wrote an article titled the 10 Worst Things About Business Travel. Anyone who has traveled extensively for business will tell you that life on the road can become both mundane and exhausting. Run into me on my third week of travel in an airport, and I’m likely to be a touch grumpy. I’m ready to go home, spend time with my family and sleep in my bed.

After reading the article, a friend of mine asked me why I continue to travel for a living, “You could get a job at 50 different companies in Rochester, if the travel is so bad, why not stop?” [Read more…]

by Adam Bahret Leave a Comment

Relating to Reliability Goals

Reliability goals are often communicated in Mean Time Between Failure (MTBF) 40,000 hrs, Failure rate 0.00035, or percentage still functioning over time 99.98%. If you are not familiar with actually calculating these numbers they really don’t mean a lot. Are any of those above numbers good? bad? something we will even measure before release?

Are any of those above numbers good? bad? something we will even measure before release? [Read more…]

by Adam Bahret 2 Comments

Is This HASS Any Good?

HASS doesn’t break stuff like HALT. HASS is like a good physical examination from a doctor: It gives you the thumbs up or thumbs down on health based on a quick and thorough examination. But a good thorough examination is possible because of research, education, and practice.
[Read more…]

by James Reyes-Picknell Leave a Comment

Capital Asset Management: Setup — part 1

Plan to Get Capital Asset Management Right

This is the first of a three part series.

Except for a few industries where mistakes can have high costs in terms of human life or massive environmental impact most of us do a poor job of setting ourselves up for success. We build or acquire new capital assets making little or no provision for spare parts, training of maintainers and operators in new skills and knowledge. Most of us do a very poor job of providing technical documentation to the support disciplines – project engineering often simply files whatever it has gathered and often in a file scheme tied to contractor contract numbers rather than using the asset hierarchy that everyone else will use in one form or another. Commissioning activities rarely push the new assets hard enough – they ramp up slowly, almost gingerly, because so few really know much about how it all should work. They are unprepared for any semblance of normal operations. [Read more…]

by James Kovacevic Leave a Comment

Is Your Maintenance Program Aligned With The Business?

Providing the right level of service to production will ensure the profitability of the business.

Using a Business Needs Analysis will ensure that your maintenance program is on the same page as the goals of the business. Often times the two are not aligned, which leads to excess costs for the business, reducing the ability to be profitable. For example, does your operation require 99.9% reliability? It would be nice but that level of reliability is extremely difficult & costly to achieve. Think of the various industries that require that level of performance. NASA, the Armed Forces, Nuclear Power, etc. require 99.9% reliability and to achieve so, the effort in design and in operation is extremely intensive. [Read more…]

by Greg Hutchins Leave a Comment

Using Risk and Safety Analysis as Part of the Requirements Process

Guest Post by Paul Kostek (first posted on CERM ® RISK INSIGHTS – reposted here with permission)

Frequently in my work as a systems engineer I’m faced with producing several artifacts for a project, typically a system architecture, model(s), requirements, safety analysis and risk analysis (management plan).

The challenge is many of these are treated as serial activities, items to be completed but not necessarily tied together. To produce an architecture and requirements that reflect all of the known/identified issues we should be working on all of these activities concurrently or at the least have a first cut at the safety and risk analysis before starting the requirements. From a project planning stand-point how these are shown on a schedule are driven by the size of the team and the project schedule. “What do we need to complete a phase/gate review” is how the schedule ends up being built versus what do we need to proceed with the systems design and architecture. [Read more…]

by Mike Sondalini Leave a Comment

Angular Contact Bearings

They are used on shafts that encounter axial forces or combined loads (both axial and radial forces). Examples are centrifugal and helical rotor pump shafts and helical and worm gear shafts in gearboxes. Their design only permits axial forces in one direction. For alternating axial loads they must be installed as a bearing set to accommodated the forces from both directions. When set back to back, and less so when set face to face, they act to stiffen the shaft and handle larger bending moments such as overhung components or high midpoint shaft loading.

Keywords: floating bearing, preload, clearance, tolerance. [Read more…]

by Fred Schenkelberg Leave a Comment

Time Compression Accelerated Life Testing

The Easy One

The easiest ALT is one that you operate an item more often then operated by the customer. Removing spans of time the item is not being bent, moved, heated, etc allows you to use time compression.

For example, a home kitchen toaster may be used for a few cycles during breakfast time in your home. In the lab, we can avoid having to wait the day of idle time and just make toast more often than just at breakfast to accelerate the operation of a toaster.

Time compression ALT is also easy to understand and describe the acceleration factor to cover the ALT results to field use conditions. Let’s explore a simple example, work out the acceleration factor and how to interpret a set of ALT results. [Read more…]