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Social and economic welfare reflects the quality of life in a region and is influenced by local social, economic, and environmental factors. East Java, as the second most populous province in Indonesia, faces challenges in improving the welfare of its residents, particularly due to varying regional characteristics such as employment, education, and population demographics. To understand the patterns of interrelationships among factors affecting welfare, this study conducted a klaster analysis to group regions based on similar characteristics. The klaster analysis employed both hierarchical (complete linkage) and non-hierarchical (K-means) approaches to determine the optimal number of klasters. The results revealed that the level of diversity across regions in East Java tends to be homogeneous in social and economic aspects, with average values exceeding standard deviations. Assumption tests for the klaster analysis confirmed that the data met the assumptions of multivariate normal distribution and dependency.Through hierarchical (complete linkage) and non-hierarchical (K-means) klaster analysis, two main klasters were formed, dividing districts/cities in East Java based on welfare characteristics. Using the complete linkage method, 27 regions were grouped into klaster 1, and 11 regions into klaster 2, while K-means grouped 26 regions into klaster 1 and 12 regions into klaster 2. Out of the six variables used, one variable was found to be insignificant in influencing the klastering results. Based on the mapping results, the grouping aligns with similar criteria, where urban areas predominantly fall into one klaster, and the other klaster is dominated by rural areas.

Organizational Citizenship Behavior (OCB) refers to voluntary actions that are not directly rewarded by the formal reward system but that contribute to organizational effectiveness. Organizational citizenship behavior (OCB) is a reflection of the added value of employees and contributes to job performance, job satisfaction, and organizational commitment. PT Erindo Mandiri is a company engaged in the production of bottled mineral water. This study aims to evaluate the effect of job satisfaction and organizational commitment on organizational citizenship behavior (OCB) at PT Erindo Mandiri, as well as to ascertain how HR management can improve company effectiveness through OCB. In this case, the researcher employs an associative method with the objective of discerning the impact of job satisfaction (X1) and organizational commitment (X2) on the organizational citizenship behavior variable (Y) at PT Erindo Madiri. The results of the research conducted at PT Erindo Mandiri indicate that job satisfaction and organizational commitment exert a positive influence on organizational citizenship behavior (OCB). The conjunction of these two variables engenders augmented individual and collective efficacy, as well as organizational systems that culminate in superior HR performance, characterized by minimal absenteeism and negligible deviations.