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Beauty clinics are currently a primary need for women and men. This is proven by the increasing number of beauty clinics that are expanding in Binjai City. This makes consumers have to be more selective in choosing a beauty clinic so they don't have to waste a lot of time and money. Beauty Clinics are included in service businesses that aim to provide satisfaction for customers or consumers. With the emergence of various types of Beauty Clinics, competition between one Beauty Clinic and another has become increasingly fierce, thus encouraging each Beauty Clinic to try to improve the quality of its products and services.

A cooperative is a business entity based on the principle of kinship. Cooperatives have the aim of improving the welfare of their members through the activities they carry out. The Binjai City Cooperatives and UMKM Service is a regional apparatus within the Binjai City Government for government affairs in the field of Cooperatives, Small and Medium Enterprises. The Binjai City Cooperatives and UMKM Department always carries out assessments of every cooperative in the city of Binjai in the form of an assessment of the best cooperatives which aims to increase the motivation of cooperative institutions and as an evaluation material for the performance of cooperatives recorded in the City of Binjai. In carrying out the assessment of the best cooperatives carried out by the Binjai City Cooperatives and UMKM Service, it took quite a long time. This is because the data collection and processing process is conventional and simple. To overcome existing problems, a decision support system was created to facilitate the management and calculations of each cooperative. In this research, the method used in the calculation process is WASPAS (Weighted Aggregated Sum Product Assessment). The Weighted Aggregated Sum Product Assessment (WASPAS) method is a method that is able to minimize errors or maximize the assessment to determine the highest and lowest values. The final result of this research is a decision support system that is able to produce decision recommendations in determining the best cooperative at the Binjai City Cooperative and UMKM Department.  

Members of the KPPS (Voting Organizing Group) are responsible for organizing voting in a polling station (TPS) during general elections in Indonesia. They are the spearhead in carrying out the democratization process by supervising and ensuring the continuity of elections honestly, fairly, and transparently. The duties of KPPS members include preparing TPS before voting begins, receiving and examining voters, supervising the election process to ensure compliance with applicable regulations, counting votes after voting is complete, reporting election results, and maintaining security and order around TPS. Decision support system is a Decision support system or Decision Support System (DSS) is an interactive system that supports decisions in the decision-making process through alternatives obtained from data processing results. The purpose of this study is to facilitate the recruitment of members of the Voting Organizing Group (KPPS). The research method is Weighted Aggregated Sum Product Assessment (WASPAS). WASPAS is to find the most appropriate priority location choices using weighting. The results of this study are that the development of this support system can help the KPU in selecting or selecting KPPS members and this decision support system as a tool in developing KPPS members by viewing or using criteria according to the criteria needed using the WASPAS method.      

Every year, Setia Janji District routinely holds village competitions. Village competition assessments are held to motivate village officials and the community to compete in building a good village. As for the village assessment, currently the calculations in the assessment are still done manually and are not yet open. Assessments also still use paper so processing takes quite a long time and is sometimes unbalanced. By utilizing technological advances, a decision support system is needed to make it easier to determine the best village in Setia Janji District. The aim of this research is to determine the best village in Setia Janji District using a comparison of the TOPSIS Method and the WASPAS Method.

Promotion is an element used to inform and persuade the market about new products or services at the company through advertising, personal sales, sales promotions, or publications. However, due to the large selection of promotional media nowadays, agencies are required to continue to make decisions well, precisely and quickly, and to be accountable in making decisions. SMP-IT Mutia Rahma is one of the private schools in the Tanjung Perak sub-district. Until now, promotional activities for student admissions have only been carried out by visiting promotional destinations, such as putting up banners in public places, as well as distributing brochures to the public to help with activities. promotion. The method currently used is still considered very slow in disseminating information regarding promotion strategies for new student admissions, apart from that, this method also requires very large costs to increase promotional media, such as brochures and banners. The school should be able to see opportunities to promote promotional activities on social media. In addition, in the last two years there has been a decline in the number of students registering.