Sustainable Overall Throughputability Effectiveness (S.O.T.E.) as a Metric for Production Systems

Abstract

This paper proposes a new index for a comprehensive and systematic measurement of sustainability and throughput performance in production systems. The proposed index, called Sustainable Overall Throughput Effectiveness (S.O.T.E.), is designed on the basis of a comparison of the environmental and operational factors. Specifically, it integrates the following four dimensions: availability, utilization, performance, and environmental sustainability. The way each dimension is measured is explained and justified. This index uses the overall environmental equipment effectiveness (OEEE) index, which is based on the Overall Equipment Effectiveness (OEE) index. However, such metrics are lacking at the factory level, because OEEE, as well as the OEE, is devoted to equipment-level. Its application and potential contribution to the analysis of sustainable throughput is demonstrated through a case study in an actual crushing plant. Through examining several hypotheses concerning the relationship between operational and environmental performance, a series of useful conclusions could be raised. The main difference and advantage of the proposed S.O.T.E. is that S.O.T.E., as it is based on the Overall Throughput Effectiveness (OTE), measures factory-level sustainability and operational performance. S.O.T.E. allows us to relate the impact of the overall effectiveness of each one of the components of the index to each piece of equipment that makes a part of the production systems. Furthermore, S.O.T.E., as OTE, take into account the production system configuration (series, parallel, assembly, etc.).

Methodology of overall equipment effectiveness calculation in the context of Industry 4.0 environment

“…Overall downtime intersection rate of both machines can be termed as the downtime intersection time t int1,2 . This reflects the relation for the calculation of overall availability for n machines (9). This relation is based on the principle of inclusion and exclusion in number of probability, more specifically, the positive parts of these numbers.…”

“…Duran [9] proposes new index for a comprehensive and systematic measurement of sustainability and throughput performance in production systems. The proposed index, called Sustainable Overall Throughput Effectiveness (S.O.T.E.…”

Overall Equipment Effectiveness: Systematic Literature Review and Overview of Different Approaches

“…Measures material usage effectiveness and identifies material loss in the manufacturing process. [191] Sustainable overall throughputability effectiveness…”

“…Meanwhile, other authors incorporated the concept of sustainability in OEE, e.g., Domingo et al (2015) [12] developed the overall environmental equipment effectiveness to identify and measure losses due to sustainability. Likewise, Durán et al (2018) [191] designed the Sustainable Overall throughput effectiveness indicator to measure the operating performance and factory level sustainability.…”

Implementing and Visualizing ISO 22400 Key Performance Indicators for Monitoring Discrete Manufacturing Systems

“…Table 1 illustrates all the fields that are provided in the description of any KPI in the ISO 22400 standards. Besides the ISO 22400 standards, the Overall Equipment Effectiveness (OEE), the Overall Throughput Effectiveness (OTE) and the Sustainable OTE present other commonly used KPIs for measuring the efficiency of machines and systems, as described in [19,20]. Table 1.…”