World Journal of Engineering Research and Technology (WJERT) has indexed with various reputed international bodies like : Google Scholar , Index Copernicus , Indian Science Publications , SOCOLAR, China , International Institute of Organized Research (I2OR) , Cosmos Impact Factor , Research Bible, Fuchu, Tokyo. JAPAN , Scientific Indexing Services (SIS) , Jour Informatics (Under Process) , UDLedge Science Citation Index , International Impact Factor Services , International Scientific Indexing, UAE , International Society for Research Activity (ISRA) Journal Impact Factor (JIF) , International Innovative Journal Impact Factor (IIJIF) , Science Library Index, Dubai, United Arab Emirates , Scientific Journal Impact Factor (SJIF) , Science Library Index, Dubai, United Arab Emirates , Eurasian Scientific Journal Index (ESJI) , Global Impact Factor (0.342) , IFSIJ Measure of Journal Quality , Web of Science Group (Under Process) , Directory of Research Journals Indexing , Scholar Article Journal Index (SAJI) , International Scientific Indexing ( ISI ) , 

World Journal of Engineering
Research and Technology

( An ISO 9001:2015 Certified International Journal )

An International Peer Reviewed Journal for Engineering Research and Technology

ISSN 2454-695X

Impact Factor : 5.924

ICV : 79.45

News & Updation

  • Article Invited for Publication

    Article are invited for publication in WJERT Coming Issue

  • ICV

    WJERT Rank with Index Copernicus Value 79.45 due to high reputation at International Level

  • WJERT New Impact Factor

    Its our Pleasure to Inform you that WJERT Impact Factor has been increased from  5.549 to 5.924 due to high quality Publication at International Level


    JANUARY 2022 Issue has been successfully launched on 1 January 2022.

  • New Issue Published

    Its Our pleasure to inform you that, WJERT 1 January 2022 Issue has been Published, Kindly check it on




Bhupender Kumar Soma, Vivek Kumar Sharmab and Sunny Seth*c


Understanding the behavior of the customers is the most challenging task which firms have to face in today’s scenario of cut-throat competition. In order to gain competitive edge firms often introduce lucrative offers and discounts due to which the customers get attracted towards particular firm these customers are termed as encouraged arrivals. As a consequence of encouraged arrivals more and more customers join the system hereby increasing the time, a customer will have to spend in waiting for the service which results in customer impatience. These impatient customers may leave the system without service. Firms often deploy various strategies to retain these reneging customers for sustainable growth. Encouraged arrivals also put service facility under pressure due to which some customers, dissatisfied with the service join the queue again as feedback customers for satisfactory service. In this paper we develop a queuing model with all issues as discussed above and solve the model in steady state to derive various probabilistic and performance measures and we also present numerical illustration for better understanding of the applicability of the model. Having known these performance measures in advance various strategies can be designed for smooth administration and functioning of the system.

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