Maintenance Management Flashcards
What’s the equation for OEE?
OEE = Availability * Operational Efficiency * Quality Rate
What does OEE stand for?
Overall Equipment Effectiveness
Which “pillar” is often neglected when companies work with Total Productive Maintenance?
a) Development management
Which factor is not included in the concept of dependability?
a) Maintenance supportability
b) Predictability
c) Reliability
d) Maintainability
b) Predictability
Which of the following can be described as a preventive maintenance practice?
a) Redesign
b) Time-based replacement
c) Emergency repair
d) Modifications
e) All above
b) Time-based replacement
Which part of the dependability concept is explained with the definition: “the probability that an
equipment will perform its intended function without failure for a specific time under defined
conditions”
a) Availability
b) Reliability
c) Maintainability
d) Maintenance support
b) Reliability
Which of the following statements describe the process of prognostics?
a) Track equipment problems and root causes
b) Predicting future failures by analysing real-time and historical data
c) Finding the fault after occurring, or in the process of the fault occurring
d) Identification of failure modes that can defeat the function
b) Predicting future failures by analysing real-time and historical data
Which of the following is not condition monitoring?
a) Vibration analysis
b) Thermography
c) The use of five senses
d) Redesign
d) Redesign
What does RCM stand for?
Reliability-Centered Maintenance
Which wear out-curves could benefit from overhaul, i.e. preventive (scheduled) maintenance?
Bathtub, wear out, fatigue
Reasons for infant mortality?
Poor joints and connections damaged components chemical impurities dirt and contamination assembly errors
Reasons for wear out failure?
Insulation breakdown
wear or fatigue
corrosion
oxidation
What does a Beta > 1 mean in Weibull analysis?
Increasing hazard function, e.g. wear
What does a Beta < 1 mean in Weibull analysis?
Decreasing hazard function, e.g. related to new installations of machine
What does a Beta = 1 mean in Weibull analysis?
Constant hazard function, random failure
Four basic features in RCM?
- Preserve functions
- Identify failure modes that can defeat function
- Prioritize function need
- Select applicable and effective PM tasks for high priority failure modes
Advantages of using RCM?
Reduction of Maintenance cost Documentation and traceability Cross-functional teamwork Emphasis on hidden failure modes Improved safety
Disadvantages of using RCM?
Time consuming (therefore expensive) Subjective, requires experience Easy to miss dominant failure modes
What does CBM stand for?
Condition based maintenance
What’s the idea of CBM?
Monitor system performance, system health, root causes of failure, forecasting remaining useful life
Advantages of using CBM?
Prevents failures
Prevents unnecessary preventive maintenance
Very useful in critical equipment
Disadvantages of using CBM?
Expensive equipment (Although changing rapidly) No failure elimination
What does smart maintenance consist of?
Data driven decision making
Human capital resource
Internal integration
External integration
