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This study aims to explain the effect of service quality on satisfaction, service quality on trust, service quality on loyalty, satisfaction on loyalty and trust on loyalty. The population in this study are all consumers who have made transactions at an Indonesian marketplace, Shopee.co.id. The number of respondents used as a sample is 300 respondents. The results showed a significant influence between variables in the four interaction effects, namely service quality on satisfaction, service quality on trust, satisfaction with loyalty, and trust in loyalty. Meanwhile the insignificant effect was service quality on loyalty, the results of the total effect calculation also showed that Trust is a mediating variable between service quality and loyalty. marketing stimuli that can be carried out include maintaining cash on delivery services to increase customer trust, optimizing customer satisfaction through service improvement, providing more organized information so that consumers are easier and more comfortable in transacting, providing a 'tracking order' stage for customers, so that customers can monitor the progress of product orders. For further research, it is hoped that it can develop more variables under study and make comparisons of other e-commerce both in Indonesia and internationally.

The historical development of the Islamic finance industry which includes banking, insurance and capital markets is fundamentally a very long historical process. The Islamic Sharia principles applied in the banking industry and Cairo is a country founded the first Islamic bank around 1971 under the name "Nasser Social Bank" operations based on a revenue sharing system (without usury). Islamic principles in muamalah that must be considered by the perpetrators of Islamic investment (related parties) are: 1.Do not look for profit in things forbidden, both in terms of substance and how to get it, and do not use it for things that are forbidden. 2. No oppressing and oppressed 3.Justice distribution of prosperity. 3. Transactions carried out on the basis of the same pleasure. No element of riba, maysir and gharar (vagueness). No doubt, to see the development of the Islamic capital market industry is still new. The effect of conventional economic outlook is still strongly felt.

This study aims to find empirical evidence regarding the factors that affect the quality of information systems and the quality of supply chain management as seen from the environmental uncertainty of the organizational structure and the distribution network competence in manufacturing companies in Medan, Indonesia. The research method used is quantitative and verification that aims to determine the relationship between variables through a hypothesis testing. The data used are primary data using a questionnaire aimed at functional managers of marketing managers and production managers with a Likert scale. The study uses a sampling technique through a census of the entire population as a unit of analysis as many as 206 managers spread across 103 manufacturing companies in the city of Medan. Data analysis was performed through multiple linear regression analysis. The results showed that environmental uncertainty, organizational structure, and distribution network competence partially and simultaneously affected the quality of supply chain management information systems in manufacturing companies.

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