The Combinatorial Optimization Problem (COPs) is one of the branches of applied mathematics and computer sciences, which is accompanied by many problems such as Facility Layout Problem (FLP), Vehicle Routing Problem (VRP), etc. Even though the use of several mathematical formulations is employed for FLP, Quadratic Assignment Problem (QAP) is one of the most commonly used. One of the major problems of Combinatorial NP-hard Optimization Problem is QAP mathematical model. Consequently, many approaches have been introduced to solve this problem, and these approaches are classified as Approximate and Exact methods. With QAP, each facility is allocated to just one location, thereby reducing cost in terms of aggregate distances weighted by flow values. The primary aim of this study is to propose a hybrid approach which combines Discrete Differential Evolution (DDE) algorithm and Tabu Search (TS) algorithm to enhance solutions of QAP model, to reduce the distances between the locations by finding the best distribution of N facilities to N locations, and to implement hybrid approach based on discrete differential evolution (HDDETS) on many instances of QAP from the benchmark. The performance of the proposed approach has been tested on several sets of instances from the data set of QAP and the results obtained have shown the effective performance of the proposed algorithm in improving several solutions of QAP in reasonable time. Afterwards, the proposed approach is compared with other recent methods in the literature review. Based on the computation results, the proposed hybrid approach outperforms the other methods.

The power-law memory effect is taken into consideration in a generalisation of the economic model of natural growth. The memory effect refers to a process's reliance on its current state and its history of previous changes. However, the study that focuses on natural growth in economics considering the memory effect with fractional order-linear differential equation model is still limited. The current investigation seeks to solve the natural growth with memory effect in the economics model and decide the best model using fractional differential equation (FDE), namely Adomian Decomposition and Variational Iteration Methods. Also, this study assumes the level of consumer loss memory during a certain time interval denoted by a parameter (α). This study showed the model of loss memory effect with 0 < α ≤ 1 given a slowdown in output growth compared to a model without memory effect. Besides that, this study also found that output Y(t) is growing faster with the Variational Iteration method compared to the Adomian decomposition method. Also, using graphical simulation, this study found the output Y(t) is closer to the exact solution with α=0.4 and α=0.9. In conclusion, this study successfully solved natural growth with memory effect in economics and decided the best model between FDE, namely Adomian decomposition and Variational iterative methods using numerical analysis.

The organizational performance at Punjab healthcare is crucial and often faces stock-outs of critical medicines and equipment at emergency department of different hospitals, which increased the mortality rate. Therefore, the study determined the effect of disruptive factors and inventory control as a mediator on organizational performance. Quantitative method with survey questionnaires on a 200-sample size through cluster sampling was used. SPSS and AMOS were used to examine Exploratory Factor Analysis, Confirmatory Factor Analysis, and Structural Equation Modeling. The results found full mediation with a significant positive effect between study variables. Further, the study indicated that strict compliance of standardized operating procedures, professionally well-equipped staff, stock availability, and accurate inventories could reduce costs with improved service quality. This study is useful for the public healthcare facilities, ministries managing inventories and body of knowledge. Finally, the backlog inventories at public sector organizations need to be researched in future.

Drawing from research on despotic leadership, employee engagement, employee trust and employee task performance using conservation of resource theory and social exchange theory, this study investigated the three-way interaction of mediating effects of employee engagement (EE) and employee trust (ET) in the link between despotic leadership (DL) behavior of supervisor and employee task performance (TP). Data collected from 310 employees reflected that despotic leadership had negative effect on follower’s task performance, yet the role of employee trust and employee engagement provided the evidence of mediation. The study has explored the rarely addressed area of destructive leadership in the cultural setting of a developing country. The findings of the study have significant implications for future research and practice.

Job performance becomes one of crucial issues and challenges faced by the organizations and it is related to employees’ performance. In conjunction with the issue, this study investigates the determinants of job performance among female employees in Malaysia. Respondents involved in this study were composed of 320 female workers selected from manufacturing, education, health and hospitality sectors. The data was collected through self-administered questionnaires by using a five-point Likert scale. The study uses two common statistical analysis, including the descriptive and inferential statistics analyses by assisting statistical software, namely the Statistical Package for Social Science (SPSS-20). The outcome shows that motivation, organizational climate, and time management significantly influenced female employees' job performance. Also, the organizational climate was a determinant factor affecting female job performance in Malaysia. Thus, the finding of this study will assist female employees and employers in understanding the factors that could affect their performance in the organization.

Green awareness is worth researching to determine the customer consumption pattern of environment-friendly products. Several research models are showing the importance of green awareness of customer behavior. This paper studies the role of information in marketing decisions related to customer green awareness. Based on the phenomenon of green awareness, this research work aims to study the role of customer green awareness built through eco-label, environmental knowledge, and perceived quality. This experimental research is conducted on 200 supermarket customers who had experience with green products. The data is collected through a questionnaire and analyzed using the Structural Equation Model approach. SmartPLS is conducted to test the research hypotheses. The findings show that there was a relationship between the eco-label credibility of environment-friendly products on the customers' increased environmental knowledge and perceived quality of the products. Besides, both environmental knowledge and perceived quality are identified to play an essential role in controlling green awareness. Eco-label in product attributes is found to be capable of changing the positive side of green awareness. These findings describe a model in developing green awareness through environmental knowledge and perceived quality with the support of environment-friendly product eco-label. The model also can predict customer green awareness and support the green marketing strategy. Therefore, further research works on green customer behavior are welcome, as green customer behavior must impact on the implementation of green marketing strategies. Also, we may predict the customer behavior of environment-friendly products, and implement better business strategies.

The purpose of this study is to investigate the compulsive buying behavior among Malaysian youths. Specifically, this study aims to examine the indirect effects of money attitude on compulsive buying through materialism. The intercept method was used where respondents were systematically selected based on every fifth student who entered the university library. A structured close-ended self-administered questionnaire was used to collect primary data. Structural equation modelling using SMART PLS 3.0 was employed in this study to analyze the indirect effects of money attitude on compulsive buying through the mediation of materialism. The results indicated that power prestige and anxiety dimensions of money attitude had significant effects on compulsive buying via materialism. Although understanding money attitude, materialism and compulsive buying may help marketers gain greater market share, ethical and socially responsible marketing strategies must also be taken into account. In addition, parents and higher learning institutions need to take initiatives to prevent the forming of maladaptive behaviors among youths. Implications and suggestions for future research are also discussed.

This study addresses the illegitimate task-related stressor that establishes a threat to the employees’ self-image. The objective of this study is to provide a clear picture on how illegitimate tasks impact on employees’ mind who work in micro informal enterprises. No single study examined this relationship among employees of informal enterprises. An active employee of micro informal enterprises (MIE’s) within Lahore city is the unit of analysis of this study. The questionnaire of the study was sent to 500 employees of informal enterprises. Participants were 425 full-time employees in informal enterprises at various position levels, representing an 85 percent response rate. SPSS 21 and AMOS 16 statistical packages were used to analyze the collected data. Normality of variables was checked with the help of Skewness and Kurtosis scores. To test the hypotheses of this study, structural equation modeling (SEM) was implemented. The analysis comprises confirmatory factor analysis (CFA) and structural equation modeling (SEM). The findings of this study show that illegitimate tasks also boost the stress level of employees who work in informal entrepreneurship. Consequently, owners and managers of MIE should organize and design such training programs that increase the level of understanding about assigned tasks.

Cheating is not new in an academic line, but a continuous problem faced by educators. Many studies reported an increase trend of cheating among students from secondary or tertiary institutions from time to time. The primary purpose of this paper is to examine the connection between subjective norms, perceived behavioral control, attitude, and intention to cheat among undergraduate students. Also, the variable of justification to cheat is assigned as moderator variable in this relationship. The paper used a survey method for data collection, administered both in electronic and paper form. The Structural equation model with partial least square (PLS-SEM) was utilized to evaluate the data obtained from 917 undergraduate students in one of the public universities in Malaysia. The results provided support that justification, alongside subjective norms, perceived behavioral control were valid predictors of intention to cheat. However, Attitude was significant with the intention to cheat. Further, the findings showed that among the three constructs of the Theory of Planned Behavior, justification could only significantly moderate the perceived behavioral control-intention to cheat relationship. The study was only conducted at one public university in Malaysia. Researchers are recommended to further examine the model in other universities and other countries. Implications for implementing strict anti-academic dishonesty policy and research are discussed.

Training and development have been applied in many aspects for organization performance. The purpose of this study is to investigate the relationships between training and development and organizational performance. In addition, the study also analyzes the influence of organizational culture as a mediator in the relationship between training and development and organizational performance. The data are analyzed using descriptive and inferential statistics. IBM Statistical Package for the social sciences software (IBM-SPSS) version 23 and Smart Partial Least Square (SmartPLS) version 4.3 were used to evaluate the hypotheses of the study. The survey of the study involved 219 employees in courier service organizations in Malaysia. The finding of the study shows that there was a positive relationship between training and development and organizational performance. Furthermore, the finding also reveals that organization culture mediate the relationship between training and development and organization performance. Hence organizations should consistently train and develop their employees through formal and informal training programs as well as encourage employees to embrace organizational culture and values as well as cultivate the core values of organizational culture amongst employees to strengthen and improve organizational performance.