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In the Big Data Era, data is the center for any governmental, institutional, and private organization. Endeavors were equipped towards extricating profoundly important bits of knowledge that can't occur assuming data is of low quality. Hence, data quality (DQ) is considered as a vital component in big data processing. In this stage, bad quality data isn't entered to the Big Data value chain. This paper, proposed the Enhanced data quality Rules discovery model (EDQRM) for assessment of quality and Big Data pre-processing. EDQRM discovery model to improve and precisely focus on the pre-processing exercises in view of quality requirements. Characterized, a bunch of pre-processing exercises related with data quality dimensions (DQD's) to automatize the EDQRM process. Rules improvement is applied on approved rules to stay away from multi-passes pre-processing exercises and disposes of copy rules. Directed tests showed an expanded quality scores in the wake of applying the found and optimized EDQRM's on data.