The document discusses Overall Equipment Effectiveness (OEE), a system used to measure the performance and effectiveness of equipment and processes. OEE is calculated by multiplying Availability, Performance, and Quality. Availability measures downtime. Performance measures the speed of production against the ideal rate. Quality measures acceptable output. An example calculation for a fiber machine shows its OEE of 73.01% compared to an industry standard of 85%, with opportunities to improve availability, performance, and quality. OEE analysis helps understand equipment status, support planning and improvements, and inform investment decisions.
2. What Is the OEE System?
• A System That used to measure and understand performance & effectiveness
for the Equipment and Processes.
It,
- Helps us to understand the current status of Machines
- Support production planning and facilitate improvement plans
- Supports investment decisions when we need to know the forecasting capex.
3. What Is the OEE System?
- Measure the down time
- Measure the planned maintenance time
- Unplanned cleaning
- Quality rate per machine
- Maximum theoretical ,ideal capacity per machine
- Defects time per machine
- Operator delay
- Material/ Spare parts shortages
- Startups/shutdown time even if short mins
4. Key factors of OEE
• Availability
• Performance
• Quality
And the equation is
Overall equipment efficiency = Availability x Performance x Quality
5. How to Calculating OEE ?
1. Availability
• Availability is calculated as Run Time to Planned Production Time:
• Availability = Run Time / Planned Production Time
• Run Time is simply Planned Production Time less Stop Time, where Stop Time is defined
as all time where the manufacturing process was intended to be running but was not due
to Unplanned Stops
• Run Time = Planned Production Time − Stop Time
6. 2. Performance
• Performance count anything that causes the manufacturing process to run at less
than the maximum possible speed when it is running (including both Slow
Cycles and Small Stops).
• Performance = (Total Count / Run Time) / Ideal Run Rate
• Performance should never be greater than 100%. If it is, that usually indicates that
Ideal Cycle Time is set incorrectly as our case for fiber machine.
7. • Quality
• Quality takes into account manufactured parts that do not meet quality standards,
including parts that need rework.
• quality is similar to FPY, in that it define Good Parts as parts that successfully pass first
time without needing any rework.
• Quality is calculated as:
• Quality = Good Count / Total Count
8. Example for OEE Fiber Machine No1 Old factory “ day “
Production Data
Shift Length 22 Hours = 1320 Minutes
Short Breaks 0 Breaks @ 0 Minutes Each = 0 Minutes Total
Meal Break 0 Breaks @ 30 Minutes Each = 0 Minutes Total
Down Time 120 Minutes
Ideal Run Rate 0.300926 PPM (Pieces Per Minute)
Total Pieces 300 Pieces
Reject Pieces 10 Pieces
Support Variable Calculation Result
Planned
Production Time Shift Length - Breaks 1,320 Minutes
Operating Time Planned Production Time - Down Time 1,200 Minutes
Good Pieces Total Pieces - Reject Pieces 290 Pieces
OEE Factor Calculation My OEE%
Availability Operating Time / Planned Production Time 90.91%
Performance (Total Pieces / Operation Time) / Ideal Run Rate 83.08%
Quality Good Pieces / Total Pieces 96.67%
Overall OEE Availability x Performance x Quality 73.01%
OEE Factor
World
Class
My OEE%
Availability 90.00% 90.91%
Performance 95.00% 83.08%
Quality 99.90% 96.67%
Overall OEE 85.00% 73.01%