The bottom line? A happy customer. And isn’t that what we want? I thank you for your attention. The invitation from GlobalSpec to do this short course, and their support in producing it was much appreciated.
Three primary steps in maintenance reliability engineering
Three Primary Steps in Maintenance Reliability Engineering by Jim Taylor, CPE, CPMM Director of Operations, Machinery Management Solutions, Inc. www.machineryhealthcare.com
Key Takeaway: Reliability Engineering can be done by the average maintenance professional michaelcardus
You work in a small to medium size facility or plant. California Cthulhu
You’re a Maintenance professional: an Engineer, a Maintenance Manager, Supervisor, Planner, or Crafts Person. theakshay .
Low availability and repeat failures on your HVAC equipment is affecting your production and customer service. mlinksva
You want to either remove or detect failure causes to manage the failures . Goal Managed Avoided Surprise Managed Avoided Surprise
Reliability Engineering principles provide a way to do that. Measure Availability Find Bad Actors Perform Failure Analysis Develop Job Plan Data Collection Implement Job Plan Repeat
One of your primary duties is to improve Availability (Ao). MTBF MTTR MLDT FRACAS
What is A o ? Availability is the proportion of time a system is in a functioning condition
To do that you must increase Mean Time Between Failures (MTBF) Czarcats
What is MTBF? Average elapsed time between failures of an operating system
How do you calculate it? Timeline from Wikipedia
How can you use it? High MTBF can result from: Design Lack of training Lack of proper tools Lack of documentation Lack of proper equipment Lack of proper maintenance Lack of proper parts
You also must reduce Mean Time To Repair (MTTR) B Rosen
What is MTTR? Average time required to repair a failed component or system. A measure of maintainability
How can you use it? High MTTR can result from: Design Lack of training Lack of proper tools Lack of documentation Lack of proper equipment
You also must reduce Mean Logistics Delay Time (MLDT) zyphbear
What is It? Average time a system is awaiting maintenance
How do you calculate it? Total delay time does not include active maintenance time
How do you use it? High MLDT can result from: Time for locating parts and tools Delivery time Locating, setting up, or calibrating test equipment Dispatching personnel Reviewing technical manuals Awaiting transportation
To keep track of it all you need a Failure Reporting, Analysis, and Corrective Action Reporting System (FRACAS). English106
You must capture the details of the failure in enough detail to do effective failure analysis. As found condition Failed components Operating parameters Sequence of events Fluid levels Signs of over temperature or pressure
You must capture the times involved in order to calculate MTBF, MTTR and Ao. Loading time = total time – planned downtime Planned downtime = scheduled maintenance time + management time Operation time = loading time – Unplanned downtime Unplanned downtime = logistics delay time + active repair time
The data you capture must be stored in a way to make analysis as easy as possible. fo.ol
After you have started collecting the data, you are in a position to do Root Cause Failure Analysis (RCFA). www.isixsigma.com
For each problem, you will find the cause, the cost, and a solution.
Determine the failure cause or causes? brendan.wood
Define the effects of the failure and their costs. Julia Manzerova Unhappy Customer
Estimate all the resources needed. Skills Tools Parts Consumables Equipment
You now have a Job Plan that should either eliminate the cause of the failures or give you enough lead time to manage the failure.
We started with a piece of HVAC equipment that was causing problems. mlinksva
We applied some basic RE principles to find the cause and develop a solution. Measure Availability Find Bad Actors Perform Failure Analysis Develop Job Plan Data Collection Implement Job Plan Repeat
We now must put that Job Plan into action and track the results.
We should see an increase in Ao and a decrease in costs. Goal Managed Avoided Surprise Managed Avoided Surprise
Key Takeaway: You can perform this kind of analysis. theakshay .
Do it and you’ll avoid surprises, and you’ll have a happy customer. Muffet
Within the next week pick a problem machine; Estimate the MTBF, MTTR, MLDT and availability, based on either history or subjective analysis. Pick a failure that is causing problems and perform a RCFA. Develop a way to manage that failure using RCM principles. Make sure the solution is both applicable and effective. Write and implement a Job Plan to correct the problem. I’ll be glad to review your project if you’d like. Your Next Step (Homework)
Questions? Comments? Jim Taylor, CPE, CPMM [email_address] 765-366-4285 http://blog.machineryhealthcare.com