整体设备效率（OEE）在提高制造效率方面起着关键作用。

OEE是一个指标，可帮助您确定在制造过程中真正富有成效的时间百分比。

An哦calculationhelps pinpoint waste generated by the 6 Big Losses - trouble spots that undermine the goal of lean manufacturing.

6个大损失是：

1. Breakdowns
2. 设置和调整
3. 小站
4. 降低速度
5. 启动拒绝
6. Production Rejects

You can use two simple approaches to do an哦calculation:

The标准公式is OEE = %A x %T x %Q. The %A (Availability) is the ratio of time the equipment was available for production to the scheduled operating time. %T (Throughput) is the ratio of the actual output to the total possible output while equipment is running. And %Q (Quality) refers to the ratio of good output to total output.

The second method, called the吞吐量比法，is handy for assessing an overall process or unique production line. That formula is OEE = (AT)/(TPR x SOT). AT (Actual Throughput) is the amount of good product produced and TPR (Theoretical Processing Rate) is the processing rate of the system's bottleneck under ideal conditions. SOT (Scheduled Operating Time) is the amount of time the system is not scheduled to be idle and includes production and maintenance.

这是一个假设的哦calculation例子：

Let’s say an ice cube tray manufacturing plant adopts the Japanese practice of Kaizen - a lean philosophy of continuous improvement.

Once Kaizen is fully embraced, every employee becomes motivated to evaluate the steps in their job function to寻找提高效率的方法.

员工注意到每1000个冰块trays produced on the manufacturing line, there was a batch of 75-95 ice cube trays that end up being molded incorrectly.

在实施Kaizen之前，员工会只是将这些Ice Cube托盘视为有缺陷的，假设这是通常的错误余地。

在Kaizen的领导下，员工专注于寻找不断改进流程的方法。他们会使用哦calculationto go back to assess each step in the ice cube tray manufacturing process to determine where improvements could be made.

In this example, a timing issue was identified in one step of the process where a machine would reset for an extra three minutes while ice cube trays tires continued to move through the line.

The result? Every 90 minutes, a batch was molded incorrectly.

By using an哦calculation，该公司决定在这3分钟内放慢制造线。这种调整提高了质量率，减少了废物。

While there is no universally agreed upon ideal OEE number target, a score of 85, using the standard formula above, indicates superior performance.

The key is not to get too wrapped up in the actual number as much as constantly being on the lookout for ways to improve your manufacturing operations.

Do that and your OEE - and your bottom line - take care of themselves.

准备了解机器监控如何改善您的OEE？