Closed-Loop Measurement of Equipment Efficiency and Equipment Capacity
نویسنده
چکیده
Formal definitions for the components of efficiency and capacity, mathematical formulas for computing overall efficiency, and data collection strategies are proposed for rigorous measurement of equipment efficiency and equipment capacity. Measurement of overall equipment effectiveness (OEE) under the TPM paradigm is revised to become a true quantitative measure of efficiency that we term overall equipment efficiency. The measurement also is extended to support the maintenance of capacity parameters for production planning. The weaknesses of equipment analyses based on utilization and aggregate UPH (units per hour) figures are contrasted against the robustness of the proposed approach. Applications in semiconductor factories are discussed.
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