reliability engineering for maintenance

Mean Time

A density figure-of-merit metric often referred to as the average or expected value. In the simplest form it appears as arithmetic S(time)/S(events) or in complicated situations as a statistic metric. It applies to mean life (ML), mean down time (MDT), mean maintenance time (MMT), mean time between failures (MTBF for repairable items), mean time to failures (MTTF for replacement items), mean time between maintenance (MTBM), mean time between maintenance scheduled (MTBMs), mean maintenance time unscheduled (MMTu), mean maintenance time scheduled (MMTs), mean time between overhauls (MTBO), mean time between unscheduled removals(MTBRu), mean time to restore (MTR), mean time between downing events (MTBDE), and so forth. The units will be time/metric, e.g., hours/failure. The reciprocal of the metric provides an incident rate, e.g., failures/hour.

Reliability Engineering for Maintenance

Bathtub Curves

The concept is derived from the human life experience involving infant mortality, chance failures, plus a wear out period of life since data for births and deaths is accumulated by government agencies. Most equipment lacks the birth/death recording by government agencies and most non-human systems can be regenerated to live/die many times before relegation to the scrap heap.

Reliability Engineering for Maintenance

Which Reliability Tool should I use?

Publisher's note: When a person has a hammer - everything looks like a nail. Once a maintenance engineer learns techniques like Reliability Centered Maintenance (RCM) or Weibull analysis, it seems like they apply the technique to every potential area of failure they can find - whether RCM or Weibull analysis can add value or not. Reliability tools must be used in the proper context to create the best result and the more tools we understand the better we can apply them.

We asked our favorite reliability guru, Mr. H. Paul Barringer to help us understand what reliability tools are available to us as maintenance professionals, when we can and should use them and what results we can expect if we apply them correctly. - Terrence O'Hanlon, CMRP, Publisher

Reliability Engineering for Maintenance

Demonstrate a simple example of reliability and you’ll gain a lot of support

Look around you. There are so many opportunities to apply common sense reliability principles and gain many untapped benefits. Watch this 8 minute video showing a simple Maintenance Task Analysis (MTA) example then think about the possibilities in your plant. Interestingly, this example was ‘stumbled' across during an RCM2 / MTA facilitator training session. You will see the value of getting Maintenance and Operations together to apply common sense strategies, in this case saving the company $11,000 annually. It's a great learning tool, too. Just imagine what you could achieve coupling RCM on high risk assets along with MTA, starting with the ‘lowest hanging fruit' in your plant.

Reliability Engineering for Maintenance

Asset Criticality – The Foundation of Best in Class Reliability

A 51 minute recorded web workshop playback on demand by Rod Acklin, Commtest

Starting or even re-engineering a reliability centered operation can be a daunting challenge. Essential to the success of your initiative is a meaningful assessment criticality for your installed asset base.

Join Commtest's Rod Acklin as he explores and guides you through how to assess meaningful asset criticality.

View this web workshop to learn:

1) Why is a meaningful criticality assessment important?

2) The essential elements of criticality

3) Applying resources based on the essential elements of criticality

Reliability Engineering for Maintenance

PM Optimisation Maintenance Analysis of the Future - Part 1

The author, Mr Steve Turner, is a professional engineer who has been extensively trained in RCM1 methods and has deployed them over a 20 year period in various roles as an airworthiness engineer, a maintenance manager, as part of a design team and as a consultant. Over the past five years, Mr Turner has developed a process of PM Optimisation known as PMO2000. This method is currently in use at 12 major industrial sites in Australia and the Asia Pacific Region.

reliability engineering for maintenance

FRACAS

Mean Time

Reliability Block Diagrams

Availability

Capability

Reliability Block Diagram Models

Bathtub Curves

Accelerated Testing

Which Reliability Tool should I use?

Run To Failure As A Maintenance Strategy

Reliability Analysis Definition

Replacement Asset Value (RAV) Definition

Demonstrate a simple example of reliability and you’ll gain a lot of support

Asset Criticality – The Foundation of Best in Class Reliability

Corrective Maintenance Definition

Optimized Planned Maintenance Strategies Using Availability Workbench SAP Portal

Establishing A Problem Solving Process In Your Company

PM Optimisation Maintenance Analysis of the Future - Part 1

Zeroing in on Optimum Maintenance

What Can We Do Before Things Go Wrong?