Maintenance Management

Question 1

What’s the equation for OEE?

Answer 1

OEE = Availability * Operational Efficiency * Quality Rate

Question 2

What does OEE stand for?

Answer 2

Overall Equipment Effectiveness

Question 3

Which “pillar” is often neglected when companies work with Total Productive Maintenance?

Answer 3

a) Development management

Question 4

Which factor is not included in the concept of dependability?

a) Maintenance supportability
b) Predictability
c) Reliability
d) Maintainability

Answer 4

b) Predictability

Question 5

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

Answer 5

b) Time-based replacement

Question 6

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

Answer 6

b) Reliability

Question 7

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

Answer 7

b) Predicting future failures by analysing real-time and historical data

Question 8

Which of the following is not condition monitoring?

a) Vibration analysis
b) Thermography
c) The use of five senses
d) Redesign

Answer 8

d) Redesign

Question 9

What does RCM stand for?

Answer 9

Reliability-Centered Maintenance

Question 10

Which wear out-curves could benefit from overhaul, i.e. preventive (scheduled) maintenance?

Answer 10

Bathtub, wear out, fatigue

Question 11

Reasons for infant mortality?

Answer 11

Poor joints and connections
damaged components
chemical impurities
dirt and contamination
assembly errors

Question 12

Reasons for wear out failure?

Answer 12

Insulation breakdown
wear or fatigue
corrosion
oxidation

Question 13

What does a Beta > 1 mean in Weibull analysis?

Answer 13

Increasing hazard function, e.g. wear

Question 14

What does a Beta < 1 mean in Weibull analysis?

Answer 14

Decreasing hazard function, e.g. related to new installations of machine

Question 15

What does a Beta = 1 mean in Weibull analysis?

Answer 15

Constant hazard function, random failure

Question 16

Four basic features in RCM?

Answer 16

1. Preserve functions
2. Identify failure modes that can defeat function
3. Prioritize function need
4. Select applicable and effective PM tasks for high priority failure modes

Question 17

Advantages of using RCM?

Answer 17

Reduction of Maintenance cost
Documentation and traceability
Cross-functional teamwork
Emphasis on hidden failure modes
Improved safety

Question 18

Disadvantages of using RCM?

Answer 18

Time consuming (therefore expensive)
Subjective, requires experience
Easy to miss dominant failure modes

Question 19

What does CBM stand for?

Answer 19

Condition based maintenance

Question 20

What’s the idea of CBM?

Answer 20

Monitor system performance, system health, root causes of failure, forecasting remaining useful life

Question 21

Advantages of using CBM?

Answer 21

Prevents failures
Prevents unnecessary preventive maintenance
Very useful in critical equipment

Question 22

Disadvantages of using CBM?

Answer 22

Expensive equipment (Although changing rapidly)
No failure elimination

Question 23

What does smart maintenance consist of?

Answer 23

Data driven decision making
Human capital resource
Internal integration
External integration