• OEE (Overall equipment effectiveness) INDICATOR: “We want to improve our processes. Where do we start?”.

    Do we know the efficiency of our processes? Do we know how you can improve?

    Efficiency and losses

    The efficiency of a process (or machine) is the relationship between the actual yield obtained and the theoretical maximum output.

    For example. Suppose that a machine can theoretically produce 1,000 units / hour. For 8 hours, it should have produced 8,000 units. However, at the end of the day we check its actual production and has been 4,800 units. The efficiency of the machine is 4,800 / 8,000 = 60%.

    Efficiency of 60% tells us that we are leveraging our machine that percentage. Or what is the same, the efficiency measures the use of resources.

    The company will be more competitive the higher the efficiency of its processes.

    And the remaining 40%? It has been transformed into what are called “losses”.

    Process losses are all that prevents efficiency is 100% and are classified into 3 groups:

    Availability losses. always appear a machine stop (faults, reformatting, lack of equipment, lack of personnel, boot machine, etc.) occurs.
    Yield losses. When the machine has not stopped, but manufactured at less than the theoretical speed. It includes microparadas (stops very short duration but very common) and degraded performance (speed reduction by quality problems, by starting manufacturing, etc.).
    Quality losses. When nonconforming product manufacture, we have spent time machine and have incurred losses quality. It also occurs when reprocess the defective product.
    OEE. Measuring efficiency

    The OEE (Overall Equipment Effectiveness) or Global Equipment Effectiveness, an indicator that measures the efficiency with which works a team or process.

    The OEE can also understand how the relationship between the time that theoretically should have cost to manufacture the units obtained (non-stop at maximum speed without defective units) and the time it has actually cost.

    As shown in the graph:

    OEE = (D) Production Time OEE / (A) = Time Planned


    This indicator can be decomposed into the product of 3 factors, related in turn with the 3 large groups of losses.

    OEE = Availability x Performance x Quality

    Availability = (B) Operating Time / (A) = Time Planned

    Yield = (C) Time Operation / (B) = Time Operating

    Quality = (D) Uptime / (B) = Time Operation

    The value of OEE Overall equipment effectiveness

    The features that the OEE indicator, which make it indispensable are:

    Is a structured and standardized way to know the efficiency of a process and more importantly, the composition of losses therefrom.
    Prioritize the lines of action, achieving increasing efficiency, with minimal resources.
    Guide the performance of groups of continuous improvement, allowing you to quickly quantify the progress made.
    It is a universal indicator, which allows
    comparison between completely different processes.

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OEE INDICATOR: Overall equipment effectiveness “We want to improve our processes. Where do we start?”

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