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Brand personality has always been considered by researchers as an important factor in branding
studies. Therefore, the present study has been conducted to evaluate the effect of brand
personality on factors related to the brand-customer relationship (brand commitment, attachment
and trust). The research model is based on the data collected from 400 questionnaires that have
been distributed and collected among the costumers of Irtoya brand - Toyota representative in
Iran - in Tehran by sampling method. Its validity been confirmed by various methods including
factor validity, content validity, and face validity, and its reliability by Cronbach's alpha method,
test-retest, and split half method. It has been tested based on structural equation modeling (SEM).
The results of this study show that brand personality affects brand trust and attachment directly
and affects loyalty indirectly. Also, the results show that brand attachment and brand trust
directly affect brand loyalty. However, in this study, the effect of brand trust on brand
commitment, as well as the effect of brand commitment on brand loyalty, was not confirmed. The
factors studied in this study are known as the main factors of customer relationship with the
brand, so if marketers need to create this relationship, it is better to use these factors in a great
way
 

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This research uses Network Data EnvelopmentAanalysis (NDEA) by  undesirable factors to analyze and evaluate the performance of automotive industry. The modeling used is applied to five production lines of an automobile company by 16 indicators. The data used are for the year 2019. The main purpose is to provide a model to improve the quality of the product by evaluating the performance of quality health in production lines able  to rank by providing appropriate quality indicators to identify, formulate and achieve corrective measures. Accompanied with accurate problem solving and operational scheduling according to the most efficient organization/production line and so investigating the source of the problem and preventing the occurrence of the problem. Because determining the direction of performance and key performance indicators (KPI) of the organization and measuring them to increase its health efficiency requires an efficient and integrated system. On the other hand, creating a homogeneous and orderly development process between the elements of the organization as a common language to solve the quality problems by aiming the improvement of the performance, customer satisfaction, sustainable production and cost management has been proposed.