One of the tofu-producing companies in Kupang City is Bintang Oesapa. With the Covid-19 pandemic,the factory needs to reconsider the amount of production by taking into account the unpredictability ofdemand and resources to minimize losses due to excessive accumulation or shortages of supplies. Indetermining the amount of production, Mamdani’s Fuzzy Inference System (FIS) can be used, whichis a method for the analysis of an uncertain system. This method has three stages in the process ofdecision making, namely fuzzification, inferencing and defuzzification. In the defuzzification stage,the FIS Mamdani has five methods, namely Centroid, Bisector, Mean of Maximum (MOM), Smallestof Maximum (SOM), and Largest of Maximum (LOM). This study discusses an application of FISMamdani with five defuzzification methods for determining daily tofu production. The purpose of thisstudy is to offer a solution by first comparing the five defuzzification methods in assessing the amount oftofu production at the Bintang Oesapa factory and then determining that which is most appropriate. Theinput variables used in this research are the amount of demand and the amount of available stock, whilethe amount of production is our variable of interest. The results showed that the best defuzzificationmethod was the MOM method with an accuracy level of 94.73% and a small error value, 5.27%. TheMOM defuzzification is expected to aid decision makers in determining the best amount of productionduring the pandemic.

The business’ level, lack of knowledge about the making process and use of hand sanitizers from natural ingredients caused sellers in Pasar Baru Kefamenanu do not apply the health protocols during transactions with buyers. Therefore, there needs to be educated about natural ingredients that can be used as hand sanitizers, the making process, and how to use them. Natural ingredients that are found in Kefamenanu are betel leaves. Education on making hand sanitizers from betel leaves helps sellers to be able to make their own hand sanitizers. The addition of aloe vera to betel leaves extract aims to make the liquid hand sanitizer becomes softer. While lime and perfume are to get rid of the betel leaves’ smell. The distribution of hand sanitizers that has been made can be an example of products from natural ingredients and the storage bottles provided can be used as a refill place for hand sanitizer.

Smartphones nowadays have become a basic need for everyone because they provide many benefits and conveniences for users. People always want to have a smartphone with good quality. However, due to the lack of information along with the many types of smartphones in circulation, it often makes it difficult for users to choose a smartphone that suits their needs. To overcome these problems, it is necessary to have a method that can provide recommendations for appropriate decision-making for users. This study aims to apply the Analytic Hierarchy Process (AHP) method and sensitivity analysis in determining the priority order of smartphone selection by comparing one smartphone to another. The criteria for consideration are Facilities, Price, Battery, and RAM with alternative choices in the form of Xiaomi, Oppo, and Vivo brand smartphones. Data collection in this study was carried out by distributing questionnaires to 100 students of the Mathematics Study Program. The data were processed using the AHP method and sensitivity analysis. AHP is used to produce a more consistent ranking order of each alternative, while the sensitivity test is carried out to measure the stability of the calculation results if there is a change in decision-making. From the results of the analysis with AHP, it was found that Xiaomi was the first priority of the respondent's choice, followed by Vivo, and the last priority was Oppo with an inconsistency level of 0.02. Meanwhile, sensitivity testing shows that RAM is the most influential criterion for changing the order of alternative priorities, where Xiaomi remains the first priority, followed by Oppo, and Vivo is the last priority.

Salah satu alasan sekolah masih belum dibuka secara penuh hingga kini adalah potensi terjadinya penularan melalui siswa-siswa yang berkumpul dalam waktu lama di ruang tertutup. Beberapa penelitian menunjukan bahwa menutup sekolah akan memperlambat perkembangan infeksi. Namun, langkah-langkah yang lebih luas seperti social distancing, terbukti memiliki efek pengendalian yang lebih besar. Risiko dari pembukaan sekolah akan bergantung pada seberapa baik sekolah mengendalikan penularan, misalnya dengan penggunaan masker dan membatasi okupansi. Oleh karena itu, perlu dilakukan kembali penguatan perilaku untuk mencegah penularan penyakit Covid-19 kepada siswa dan guru. Bentuk Kegiatan Pengabdian yang dilakukan adalah pembagian masker dan edukasi mengenai dampak penyakit Covid-19 kepada siswa dan guru SDK Seoam 1 Eban, Kefamenanu. Hasil dari kegiatan ini adalah para siswa dan guru dapat melakukan protokol kesehatan secara sadar dan benar yaitu melalui 3M: memakai masker, menjaga jarak dan menghindari kerumunan, serta mencuci tangan pakai sabun.   Kata Kunci: Covid-19, Protokol Kesehatan, Guru dan Siswa

Tua Kolo (Sopi Timor) merupakan salah satu produk alkohol lokal yang sangat erat hubungannya dengan budaya masyrakat Timor. Minuman ini sering digunakan dalam berbagai acara adat istiadat seperi pernikahan, pemakaman, dll. Tua Kolo berbahan dasar nira lontar dan diproses melalui fermentasi dan destilasi secara tradisional. Pabrik Sane Up-ana merupakan salah satu pabrik di tanah Timor yang memproduksi Tua Kolo. Tingkat produksi pabrik tidak selalu tetap dalam setiap periode, dimana permintaan konsumen berubah-ubah setiap bulan bahkan setiap hari sehingga pabrik terkadang tidak mampu memenuhi permintaan pasar akibat permintaan yang meningkat dan kurangnya persediaan. Ketidakpastian dalam menentukan jumlah produksi menyebabkan kerugian pada pabrik sehingga diperlukan suatu metode yang dapat mengoptimalkan jumlah produksi agar keuntungan pabrik dapat meningkat. Metode yang dapat digunakan untuk menentukan keputusan berdasarkan ketidakpasian data adalah fuzzy inference system (FIS). Metode ini didasarkan pada konsep logika fuzzy. Salah satu metode FIS yang paling sering digunakan dalam menentukan jumlah produksi adalah metode FIS Mamdani. Proses penentuan keputusan akhir dengan metode ini memiliki beberapa tahap yaitu aplikasi fungsi implikasi, komposisi aturan dan defuzzifikasi. Untuk tahap defuzzifikasi, terdapat lima metode yang dapat digunakan yaitu metode Centroid, metode Bisektor, metode Mean Of Maximum (MOM), metode Smallest Of Maximum (SOM) dan metode Largest Of Maximum (LOM). Penelitian ini bertujuan untuk menentukan jumlah produksi Tua Kolo 45% dengan mempertimbangkan permintaan, persediaan produk dan persediaan bahan baku. Untuk memperoleh hasil yang optimal pertama-tama akan diselidiki metode defuzzifikasi terbaik yang akan digunakan dalam sistem. Dalam penentuan metode defuzzifikasi terbaik digunakan ukuran MAPE. Hasil penelitian menunjukan bahwa centroid merupakan metode defuzzifikasi terbaik dengan tingkat kesalahan prediksi sebesar 18,95% atau tingkat ketelitian sebesar 81,05% sehingga dapat disimpulkan bahwa metode centroid sangat cocok dalam memproduksi tua kolo (sopi Timor) pada Pabrik Sane Up-ana Kefamenanu.