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Definition of operational research noun from the Oxford Advanced Learner's Dictionary

operational research

noun

/ˌɒpəreɪʃənl rɪˈsɜːtʃ/,

/ˌɒpəreɪʃənl ˈriːsɜːtʃ/

/ˌɑːpəreɪʃənl ˈriːsɜːrtʃ/,

/ˌɑːpəreɪʃənl rɪˈsɜːrtʃ/

(also operations research)

[uncountable] (specialist)

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the study of how businesses are organized, in order to make them more efficient

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noun

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