Measuring OEE - A worked example
Measuring OEE - A worked example
Joe Bloggs Ltd operates a can making company. The company wants to start calculating the OEE for the machine and has the information below available. Using this information, calculate the OEE for the can making machine for this week.
| Availability Data: Shift pattern - one shift, 10 hours per day for 5 days a week Planned Downtime - 0.5 hour per day for routine maintenance Unplanned downtime - 1 hour per day Tea/lunch breaks - 3 hours per week |
| Performance Data: The machine is meant to make 1000 cans in a 10 hour day. The machine actually made 800 cans each day this week |
| Quality Rate Data: Of the 800 cans per day made, 50 each day are scrap |
OEE Calculations - Availability:
| Availability | |
| Total Available Time (hours per week) A | 5 x 10 = 50 (hours per week) |
| Planned Downtime (hours per week) B | (5 x 0.5) + 3 = 5.5 (hours per week) |
| Net Available Time = (A) - (B) (hours per week) C | 50 - 5.5 = 44.5 (hours per week) |
| Unplanned Downtime (hours per week) D | 1 x 5 = 5 (hours per week) |
| Operating Time = (C) - (D) (hours per week) E | 44.5 - 5 = 39.5 (hours per week) |
| Availability = (E) ÷ (C) | 39.5 ÷ 44.5 = 0.89 |
OEE Calculations - Performance Efficiency:
| Performance Efficiency | |
| How many parts could have been made in the time available (1 week) A | 1000 x 5 = 5000 parts |
| How many parts are actually made in the time available (1 week) B | 800 x 5 = 4000 parts |
| Performance Efficiency = (B) ÷ (A) C | 4000 ÷ 5000 = 0.80 |
OEE Calculations - Quality Rate:
| Quality Rate | |||||||
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Overall Equipment Effectiveness:
| = | Availability | x | Performance Efficiency | x | Quality Rate |
| = | 0.89 | x | 0.80 | x | 0.94 |
| = | 0.67 |
