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Overall Equipment Effectiveness

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Measure the efficiency of the machine during its loading time

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Overall Equipment Effectiveness

  1. 1. Overall Equipment Effectiveness (OEE)<br />Measure the efficiency of the machine during its loading time<br />Anand Subramaniam<br />
  2. 2. 2<br />“Experience is directly proportional to the amount of equipment ruined.” <br />- Harrisberger's Fourth Law of the Lab<br />
  3. 3. Overall Equipment Effectiveness <br />OEE figures are determined by combining the availability and performance of the equipment with the quality of parts made<br />OEE measures the efficiency of the machine during its loading time. <br />Planned downtime does not effect the OEE figure<br />3<br />
  4. 4. Overall Equipment Effectiveness (OEE)<br />4<br />
  5. 5. Equipment Losses<br />5<br />Speed Loss<br />Reduced speed<br />Minor stopping <br />Down Time Loss<br />Set-up / adjustments<br />Equipment failure / breakdowns<br />Quality Loss<br />Rework / scrap<br />Process errors<br />
  6. 6. Material & Manpower Losses<br />6<br />Material Loss<br />Material yield<br />Energy losses<br />Manpower Loss<br />Waiting Instructions<br />Waiting Materials<br />Waiting Quality Confirmation<br />Cleaning & Checking<br />
  7. 7. Set-up<br />Availability losses<br />Breakdown<br />Minor Stoppages<br />Performance losses<br />Speed losses<br />Start-up losses<br />Quality losses<br />In process losses<br />Losses – Example<br />Inconsistent Times, Insufficient skills. Poor Planning & scheduling, Different methods, Poor tooling, Poor start up controls, Missing parts, Insufficient support, Excess start-up adjustment<br />Lack of maintenance, Low operator interest, not knowing of problems, Poor Training, Design Problems, Inferior Material <br />Material not available, Change over at start / end Jams / misfeeds / overloads, operator error, operator absence <br />Overall Equipment Effectiveness<br />Unclear design specs., poor maintenance history, incorrect settings, Poor Training, Speed deliberately reduced, inconsistent Material <br />Poor machine changeover, Inconsistent materials, No start-up check lists, Waiting for temp. - pressures, Minor adjustments<br />Temperature & pressure changes, inconsistent materials, Process not followed, poor calibration, Gauges not calibrated properly.<br />
  8. 8. OEE Calculation<br />8<br />OEE = Availability *performance * Quality yield <br />Availability (Down Time Loss) = Time available for production - Downtime Time available in production<br />Performance (Speed Loss) = Ideal cycle time x processing quantity Operating time<br />Quality Yield (Quality Loss) = Total processed quantity – defect Total processed quantity<br />
  9. 9. OEE Worked Example<br />=<br />Load – Down Time<br /> Load Time<br /> 460 min – 60 min<br /> 460<br />Time x Processed Qty<br />Operating Time<br />0.5/ unit x 400 units<br /> 400 minutes<br />Processed Amount – Amount of Defects<br />Processed Amount<br />400 – 8 400<br /> x 100%<br /> = 87%<br /> x 100%<br /> = 50%<br /> x 100%<br /> = 98%<br />1. Unexpected Eq. Breakdown<br />2. Set-up & adjustments<br />3. Idling and minor stoppages<br />4. Reduced speed<br />5. Defects in Process<br />6. Reduced Yield<br /> Availability<br />:<br />Performance<br />Quality Yield <br />]<br />]<br />=<br />OEE = .87 x .50 x .98 = 46.2 %<br />]<br />=<br />
  10. 10. 10<br />“Skiing consists of wearing $3,000 worth of clothes and equipment and driving 200 miles in the snow in order to stand around at a bar and drink.” <br />- P. J. O'Rourke<br />
  11. 11. 11<br />Good Luck<br />http://www.linkedin.com/in/anandsubramaniam<br />

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