Statistical Methods for Evaluating the Effect of Operators on Energy Efficiency of Mining Machines


Research has recognised operators' skill as important factors affecting performance and energy efficiency of mining equipment. Modern monitoring tools generate large, highly variable, and, often, skewed energy efficiency data sets. Well-conceived statistical tests should be used to assess the effect of operators on energy efficiency in such situations. However, in many cases in the mining literature, the choice of statistical tests to evaluate operator effects has not been systematic and rigorous and, often, the underlying assumptions of these tests have not been examined before their use. This work provides a systematic method, synthesised from the statistical literature, to rigorously evaluate the effect of operators on energy efficiency of mining equipment. Mine engineers and managers can use this method to evaluate whether differences exist in energy efficiency of their operators given sample data and focus on operator training, if they find cause to improve operator performance.


Mining Engineering

Keywords and Phrases

Energy Efficiency; Mining Equipment; Operator's Effect; Mining Equipment Performance; Statistical Tests

International Standard Serial Number (ISSN)


Document Type

Article - Journal

Document Version


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© 2014 Maney Publishing, All rights reserved.

Publication Date

01 Jan 2014