Maintenance Strategies
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Questions and Answers

What is the main advantage of Breakdown Maintenance?

  • Reduced production downtime
  • No scheduling required (correct)
  • Lower spares inventory costs
  • Predictive overhaul of equipment
  • What is the main disadvantage of Preventive Maintenance?

  • Higher costs due to improper repair (correct)
  • Reduced machine life
  • Increased spares inventory costs
  • Unplanned production losses
  • What is the main purpose of Predictive Maintenance?

  • To reduce production downtime
  • To determine the health of machinery (correct)
  • To repair equipment after breakdown
  • To extend machine life
  • What is an example of Predictive Maintenance?

    <p>Sampling oil from a vehicle's engine for metal shavings</p> Signup and view all the answers

    What is a disadvantage of Breakdown Maintenance?

    <p>Unplanned production losses</p> Signup and view all the answers

    What is an advantage of Preventive Maintenance?

    <p>Longer machine life</p> Signup and view all the answers

    When is Preventive Maintenance typically performed?

    <p>Every morning or every 2nd to 3rd day</p> Signup and view all the answers

    What is a characteristic of Breakdown Maintenance?

    <p>Use or operate equipment until it breaks down</p> Signup and view all the answers

    What is the primary aim of Total Productive Maintenance (TPM)?

    <p>To increase the Overall Equipment Effectiveness of plant equipment (OEE)</p> Signup and view all the answers

    What is the main objective of Project Maintenance?

    <p>To perform maintenance on a specific part of the plant</p> Signup and view all the answers

    What is the benefit of Autonomous Maintenance in TPM?

    <p>It gives operators greater ownership of their equipment</p> Signup and view all the answers

    What is the term used by Eskom to describe the shutdown of a part of the plant for maintenance?

    <p>Outage</p> Signup and view all the answers

    What is the disadvantage of not analyzing the information gathered from inspection and monitoring?

    <p>Future maintenance needs may not be identified</p> Signup and view all the answers

    What is the term used to describe the process of maintaining the plant or equipment in good condition?

    <p>Deterioration prevention</p> Signup and view all the answers

    What is the main factor that affects the implementation of TPM?

    <p>Commitment to training</p> Signup and view all the answers

    What is the term used to describe the percentage of time that a machine is available for production?

    <p>Availability</p> Signup and view all the answers

    Study Notes

    Maintenance Strategies

    Breakdown Maintenance

    • Involves running equipment until it fails, then repairing or replacing it
    • Often used for non-critical or inexpensive equipment
    • Advantages: no scheduling required, some equipment cheaper to replace than repair
    • Disadvantages: unplanned production losses, catastrophic equipment failure, high spares inventory costs, secondary machinery damage

    Preventive Maintenance

    • Planned maintenance performed at regular intervals (e.g., daily or every 2-3 days)
    • Examples include greasing conveyor belt bearings
    • Advantages: longer machine life, reduced production downtime, fewer spares required
    • Disadvantages: potential unplanned production losses, unnecessary repairs or replacements

    Predictive Maintenance

    • Involves inspecting or testing equipment to determine its condition
    • Uses condition monitoring equipment (e.g., vibration monitoring, contamination monitoring)
    • Example: oil sampling in vehicles to predict engine, transmission, or differential overhaul
    • Advantages: reduces unscheduled downtime, extends maintenance repair intervals, minimizes unnecessary repairs
    • Disadvantages: high initial investment, potential lack of commitment to training, inspection data may not be analyzed

    Project Maintenance

    • Combination of various maintenance strategies with a single plan and set timeline
    • Often referred to as "general overhauls" or "shutdown maintenance"
    • Examples: Eskom's "outage" or "shutdown" maintenance, where a plant subsystem is disassembled and repaired over 2-5 months

    Total Productive Maintenance (TPM)

    • Aims to identify and prevent issues before they occur (deterioration prevention)
    • Focuses on proactive and preventative techniques to improve equipment reliability
    • Goals: increase Overall Equipment Effectiveness (OEE), maintain equipment in good condition without interfering with daily processes
    • OEE factors: Performance, Availability, Quality
    • Autonomous Maintenance: operators perform daily inspections, maintenance, and repairs, giving them greater "ownership" of equipment.

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    Description

    This quiz covers two common maintenance strategies: Breakdown Maintenance and Preventive Maintenance, including their advantages and disadvantages.

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