The weighted product method and portfolio assessment in ranking student achievement

The learning process has a correlation with learning achievement which can be shown through the marks given by a teacher to students from several fields of study. The ranking of student learning achievements performed by the school refers to the grades of the subject is important for the SNMPTN (National Selection for State Higher Education). To determine student achievements, the method used in the current study is the weighted product. If the results of student ranking using the WP method have the same value, then a portfolio assessment is used. Of the 127 student achievement ratings, there were seven people who had the same Vector value. Then, the seven people who have the same vector value were graded using portfolio assessment. The results showed that the implementation of the WP method and portfolio assessment could determine the ranking of student achievement. E-ISSN 2548-7779 ILKOM Jurnal Ilmiah Vol. 13, No. 2, August 2021, pp. 148-154 149 Sumpala, et. al. (The weighted product method and portfolio assessment in ranking student achievement) Several researchers have applied the WP method with different cases including the selection system for outstanding students with criteria for structure and grammar scores, vocabulary scores, reading scores, writing scores, listening scores, and speaking scores [6]. The application of the WP Method was also implemented in the Selection of the Best Graduates in Faculty of Engineering, University of Muhammadiyah Purwokerto with criteria for GPA, period of study, maximum C grade of 1 and no D grade [7]. Also, it was used for granting credit using the WP method at BMT Mu'amalah Sejahtera Kendari with the criteria used for completeness of files, guarantees, income, and type of business [8]. Portfolio evaluation is used if the results of ranking students with the WP approach have the same value. Portfolio evaluation is a collection of evidence of the success of a student or group of students, including the evidence of achievement, abilities, and attitudes [9]. Method The form of a decision support system flowchart using the WP method show in Figure 1. Figure 1. System flowchart A. Decision Support System (DSS) Decision support system is a tool designed to support managers in making decisions that require judgment and cannot be supported by algorithms [10]. The components of the DSS are presented as shown in Figure 2. Figure 2. The components of the DSS 150 ILKOM Jurnal Ilmiah Vol. 13, No. 2, August 2021, pp. 148-154 E-ISSN 2548-7779 Sumpala, et. al. (The weighted product method and portfolio assessment in ranking student achievement) Decision Support Systems have four interrelated subsystems: 1. Data Management consists of databases containing specific data managed by software (DMBS). 2. Model representation is a software that contains statistical models and quantitative models that has the ability to analyze. 3. Knowledge-Based Management is a subsystem that can help other subsystems and has the ability as an independent component. 4. Dialog page/user interface system allows users to connect with other devices and give commands. The following are the advantages of a decision support system: 1. Able to assist in finding solutions to difficult problems. 2. Have a quick response to unexpected situations. 3. Able to easily and precisely apply a number of different techniques to various configurations. 4. Can improve management control and performance 5. Communication made easier 6. Minimize costs 7. Have more informed decisions 8. Can increase managerial effectiveness by enabling managers to work for shorter periods of time and with less effort 9. Increase analysis productivity B. Weighted Product Method Weighted Product (WP) is a multiplication method for related attribute rankings, where each criterion rating must be raised to the first power with the criteria weight. This process is also known as the normalizing process [11]. The equation (1) expresses the preference for alternative values of Ai