Permasalahan yang sering terjadi saat ini adalah kecelakaan kerja pada PT galang kapal. Faktor penyebab kecelakaan seperti, Kelalaian manusia, Peralatan yang digunkanan serta system manajeman yang diterapkan dalam proses kerja, Contoh kecelakaan kerja dari beberapa sumber  Koran dan berita di kota Batam yaitu terbakar di dalam kapal,tertimpa besi berat dan wajah melepuh terkena minyak kapal. Tujuan penelitian adalah  memprediksi kecelakaan kerja, memperkecil resiko kecelakaan kerja dan Cara mengantisipasi kecelakaan kerja. Medode Mamdani merupakan cara yang tepat  dalam memprediksi kecelakaan kerja. Langkah kerja metode mamdani, pertama menentukan fuzification, mesin iferensi dan nilai hasil akhir berupa nilai output Hinggan menghasilkan keputusan dalam memprediksi kecelakaan kerja. Batasan dan cakupan penelitian ini 1. Memprediksi tingkat kecelakaan kerja. 2.Kriteria penyebab kecelakaan kerja 3.Menggunakan metode Mamdani dan  Implementasikan menggunakan  Software Matlab. Manfaat  penelitian mengurangi resiko kecelakaan kerja,   Kata kunci:  Logika  fuzzy, Metode Mamdani Defuzifikasi   Abstract The problem that often occurs today is a work accident at Shipyard Companies. Factors causing accidents such as human negligence, equipment used and management systems applied in the work process. Shipyard The examples of work accidents from several newspapers and news sources in Batam are burning inside the ship, hit by heavy iron and blistered faces exposed to ship oil. Therefore, the objective of this research is how to predict work accidents, minimize the risk of workplace accidents and how to anticipate workplace accidents. Moreover, Mamdani method is the right way to predict work accidents. The step ofMamdani method; first determinefuzzification, the efficiency of machine and the final value in the form of output values until it produces a decision in predicting work accidents. Limitation and scope of this research, 1. Predict the level of workplace accidents. 2. Criteria for the cause of work accidents 3. Using the Mamdani method and implementing it using. The benefits of research reduce the risk of workplace accidents.   Keywords: Fuzzy Logic, Mamdani, Defuzzification Method

A company must set a high standard of discipline so that the company can develop quickly. A good company cannot be separated from the performance of employees in the form of standard rules made. With the standard, the company can see employees who excel and can be used as examples for other employees. There are 3 generated criteria such as performance, target and absence. The main purpose of this study is to provide criteria for selecting outstanding employees in a company. This study uses mamdani which uses the lowest min value and uses the AND operator to get the results. There are four things in the Mamdani fuzzy process, the first is the fuzification of the determination of the input value, the second is the application of the implication function, the third is the inference rules and the last is defuzzification. The results of this study can be used as a standard in determining outstanding employees at PT Berkah

Dalam pelaksanaan suatu proyek pembangunan kapal, perencanaan biaya merupakan fungsi yang paling pokok dalam mewujudkan tujuan proyek seperti halnya kesesuaian biaya, waktu dan mutu perlu dilakukan secara terpadu dan menyeluruh, terlebih khusus dalam hal biaya diperlukan untuk upah dan bahan. Banyak kontraktor yang mengalami kerugian dalam proyek bangunan kapal karena harga penawaran proyek tidak mampu menutupi biaya – biaya operasional dan upah karyawan buruh. Salah satu penyebab kontraktor mengalami kerugian adalah tidak mampu menghitung biaya – biaya yang harus di keluarkan dalam proses pembangunan proyek kapal. maka dari itu dibutuhkan sebuah sistem. Penyelesaian masalah produksi menggunakan metode Sugeno menggunakan konstanta atau fungsi matematika dari variabel input, dan pada proses defuzzifikasinya mengunakan metode rata-rata terpusat.

At present, many accidents occur on shipping, whether from human negligence or from disasters that occur without human knowledge. Then a rule is made before sailing the parties concerned must check everything related to shipping to avoid accidents. Batam is an archipelago that is connected between many islands, so that sea transportation is the main budget in crossing to various islands. Nowadays there are many accidents such as ships sinking, ships colliding and ships burning, this is due to human negligence. The main objective of this research is to improve shipping safety in Batam City, by observing the waves and engine checks when the ship is about to depart the crew must pay attention to this in order to avoid accidents on the cruise that will be used. So that the passenger safety of the ship is guaranteed. In this study using the mamdani method. The Mamdani method looks for the smallest value to the greatest value. In the Fuzzy method there are three operators, OR, AND and NOT operators. This study uses the OR operator. The steps of this research work, 1. Determine the input variable 2, determine the fuzzy set, 3, rule composition, 4, the final result is in the form of defuzification. The results of this study are in the form of a decision-making system in determining the level of maritime shipments and how to prevent them from occurring accidents in the shipping system by taking into account the input variables that have been set such as safety devices, paying attention to waves and always checking ship engines regularly. So that accidents can be avoided. So that the safety of shipping in the city of Batam is more guaranteed.