Fuzzy Logic Implementation Using The Tsukamoto Method As A Decision Support System In Scholarship Acceptance

- Scholarships are a supporting factor for students. In the process of determining who receives the scholarship we need a decision-making process is subjective, with the criteria some students who have the ability or value that is not so different. With the existence of a system that supports decision making in determining who is entitled to a scholarship. This system is supported by the Tsukamoto fuzzy logic method which is based on data or human resources rules with criteria that have been determined by a group of people. Therefore, the results of this process will be given to students based on existing decisions.

Scholarship is a form of financial assistance given to individuals whose purpose is to be used in the educational process that is taken.Every educational institution, especially at universities or high schools, will offer many scholarships to students.These scholarships come from the government or from the private sector who collaborate with the university.To determine the acceptance of the scholarship, it must be in accordance with predetermined criteria or rules.General criteria that are usually required to receive scholarships are assessed in terms of academic achievement index (GPA), family economic condition, organizational activeness during education, distance from home to campus, and others.Every time there is a scholarship announcement there will be a lot of students who will take part in it and not all scholarship applications are accepted, so a decision support system is needed that can help provide recommendations for scholarship recipients.
The problem that often arises in the provision of scholarships is the difficulty in determining each student who is eligible for a scholarship because of the limited quota provided and the number of students applying for scholarships is the main difficulty for certain universities.
By knowing the problems that often occur in each university, there is an idea that can be built as a decision support system in scholarship acceptance using an appropriate and applicable method in solving scholarship acceptance problems.Based on the existing background, an explanation of the scholarship acceptance system can be explained.

Basis of theory a. Decision Support System
A decision support system is a system that is able to provide a problem solving and communication skills for problems with semi-structured and unstructured settlement conditions.With the aim of providing information that provides predictions and directs information users to make better decisions.Fuzzy Logic The fuzzy set is based on the idea of extending the range of characteristic functions such that the function will cover real numbers in the interval [0,1].Its membership value indicates that an item in the universe is not only at 0 or 1, but also a value that lies between it.In other words, the truth value of an item is not only true or false.A value of 0 indicates false, a value of 1 indicates true and there are still values that lie between true and false.There are several things that need to be known in understanding fuzzy systems : • Fuzzy variables.Is a variable to be discussed in a fuzzy system, for example: age, temperature, demand and so on.
• Fuzzy sets.Is a group that represents a certain condition or condition in a fuzzy variable, for example: -The age variable is divided into 3 fuzzy sets: young, middle, old.
Fuzzy logic is an alternative to various existing systems in decision making because fuzzy logic has the following advantages : ➢ Fuzzy logic has a very simple concept so it is easy to understand.➢ Fuzzy logic is very flexible, meaning that it is able to adapt to changes and uncertainties.➢ Fuzzy logic tolerates imprecise data.

➢
Fuzzy logic is able to systematize very complex non-linear functions.➢ Fuzzy logic can apply the experience or knowledge of experts.In the Tsukamoto method, each consequence of the IF-Then rule must be presented with a fuzzy set with a monotonous membership function.As a result, the inference output of each rule is given crisp based on the αpredicate (fire strength).The final result is obtained using weighted averages.
According to Sutojo (2011: 233), in general, the shape of Tsukamoto's fuzzy model is:

d. Research Methods
In building a decision support system that will clearly solve the problem, data collection techniques are used to obtain information about the object of the research problem, in the form of : • Observation techniques, namely direct observation at the research site of the object that will be used as a source of research data used by the author by collecting data.
• Interview technique, which is to hold questions and answers directly with the parties related to the problem of the object of research to obtain accurate information.
• Literature techniques, to obtain theoretical studies as a theoretical basis in analyzing the design of an ongoing system.

Result and discussion
The application of the Tsukamoto method is used to determine which students are eligible for scholarships based on criteria in terms of the Grade Point Average (GPA), the economic condition of the family and the distance between the student's house and campus.So, a fuzzyfication method, rule formation, inference engine and defuzzyfication were implemented.

a. Fuzzyfication
At this stage, the division process will be carried out into three linguistic variables using variable functions that will be determined according to the criteria in order to get the results of student decisions that deserve a scholarship.And following the fuzzyfication according to the criteria will be described.

Assessment of the cumulative grade point average (GPA)
The GPA criteria will be divided into 3 sets that will represent each student's GPA score, namely: low GPA, medium GPA and high GPA.

Family Economic Situation
In determining the economic condition of the student family applying for scholarships, it will be divided into 3 groups, namely : underprivileged economic conditions (TM), moderately well-off economic conditions (AM), poor economic conditions (M) On this criterion, students applying for scholarships must attach a parent's salary slip from the company or income statement from the local RT / RW.Following is the membership function of the variable family economic condition.

c. Inference Engine
At the inference engine stage, in determining the students who pass the scholarship awarded by the university, they will apply the MIN function to each rule used in the decision support system with its implication function.

d. Defuzzyficationi
At the defuzzyfication stage, in determining the qualification for students to get scholarships, calculations can be made based on the formation of rules so that later the results of the names of students who receive the scholarship will be obtained.

Figure 2 . 1
Figure 2.1 Components of a Decision Support System (DSS) b.Fuzzy Logic The fuzzy set is based on the idea of extending the range of characteristic functions such that the function will cover real numbers in the interval [0,1].Its membership value indicates that an item in the universe is not only at 0 or 1, but also a value that lies between it.In other words, the truth value of an item is not only true or false.A value of 0 indicates false, a value of 1 indicates true and there are still values that lie between true and false.There are several things that need to be known in understanding fuzzy systems :• Fuzzy variables.Is a variable to be discussed in a fuzzy system, for example: age, temperature, demand and so on.•Fuzzy sets.Is a group that represents a certain condition or condition in a fuzzy variable, for example: -The age variable is divided into 3 fuzzy sets: young, middle, old.Fuzzy logic is an alternative to various existing systems in decision making because fuzzy logic has the following advantages :➢ Fuzzy logic has a very simple concept so it is easy to understand.➢ Fuzzy logic is very flexible, meaning that it is able to adapt to changes and uncertainties.➢ Fuzzy logic tolerates imprecise data.➢Fuzzylogic is able to systematize very complex non-linear functions.➢ Fuzzy logic can apply the experience or knowledge of experts.In general, fuzzy has four stages in solving problems, namely : and (Y IS B) Then (Z IS C) Where A, B, and C are fuzzy sets.Suppose the following 2 rules are known, IF (x is A1) AND (y is B1) Then (z is C1), IF (x is A2) AND (y is B2) Then (z is C2) In inferencing, Tsukamoto's method uses the following stages.o Fuzzyfication o Establishment of a Fuzzy knowledge base (rules in the form of IF ... THEN) o Inference Engine, Using the MIN implication function to get the α-predicate value of each rule (α1, α1, α1,….αn).oDefuzzyfication, Using the average method (Average).

Figure 5 . 1
Figure 5.1 The membership function of the GPA variable

Figure 5 . 3
Figure 5.3 Membership Function of Family Economic Condition Variables In general, fuzzy has four stages in solving problems, namely :