Reliability Maintenance Engineering 2 - 4 Purpose and Equipment
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Reliability Maintenance Engineering Day 2 Session 4 Purpose and Equipment Three day live course focused on reliability engineering for maintenance programs. Introductory material and discussion ranging from basic tools and techniques for data analysis to considerations when building or improving a program.
Transcript of Reliability Maintenance Engineering 2 - 4 Purpose and Equipment
EQUIPMENT SELECTION AND REVIEW
Day 2 Session 4
Objectives
• Examining the lifecycle process• RAM modeling to evaluate designs• Conducting the Maintainability Design Review• Developing a MDR checklist
Lifecycle Process
Concept
Design
MFGUse
End of life
Concept & Design
Concept
• System Architecture• Reliable v Available• Goal setting
Design
• Selection of materials• Selection of
components• Risk identification• Tradeoffs
Production & Use
Production (manufacture)
• Process variation• Materials variation• Shipping variation• Installation variation
Reliability only gets worse
Use
• Operation Stress• Environment Stress
• Maintenance Plan• Failure Detection
End of life
Decommissioning
• Lessons learned• Tear down and analysis• Reliability Differences
with today’s model
Discussion & Questions
Reliability Modeling
• Focus on function– Common– Perfect product
• Focus on reliability– Uncommon– Imperfect product
• CAD, FEA, Simulations
Design Comparison
• Reliability occurs in the design
• Selecting the most robust options
• DOE, Stress/Strength, Aging, Maintenance Costs, Failure Costs
What if analysis
• What could go wrong?
• Explore changes to – Environment– Construction– Use profile– Materials
Good designer do this naturally
System Modeling
• Simulate different– Maintenance policies– Maintenance practices– Supply chain changes
• DOE to design the experiments
• Output is cost of ownership and availability
Discussion & Questions
Design Reviews
• Adversarial or Constructive
• Formal or informal
• Status update or detailed design check
How do you approach reviews?
Stages of Review
• During design– Risk assessment– Options and benefits– Decisions
• During review– Increase awareness– Identify errors (Petroski)– Celebrate failures
• After review– Process improvement– Lessons learned
Hosting a review
• What is the purpose?
• What decisions are being made?
• What is desired outcome?
Be clear on why
Considerations
• People– Knowledgeable– Stakeholder– Perspective
• Timeline– Time for details– Time for action
• Meetings– One on one– Group
Discussion & Questions
Review checklists
• Avoid using a checklist or database– Detailed checks, i.e.
keepouts, sizing, etc.– Goal is do the checklist
• Do use the approach guided by checklist– Higher level– Range of stresses
Review guidelines
• Brainstorming approaches– Day in the life– Range of stresses– Change one thing
• Make it safe to talk about failure– Not personal– No attacks– No solutions (take offline)
Checklist cautions
• Design checklists
• Testing checklists
• Review checklists
Only works if you know everything and follow the spirit of the checklist
Golden Nuggets
• An example that has been very effective
• Identify key failure patterns
• Review before and after project– What will you do?– What did you do?
Discussion & Questions
Summary
• Examining the lifecycle process
• RAM modeling to evaluate designs
• Conducting the Maintainability Design Review
• Developing a MDR checklist
Equipment Selection & Review
