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All Journal Paradikma: Jurnal Pendidikan Matematika Jurnal Riset Rumpun Matematika dan Ilmu Pengetahuan Alam (JURRIMIPA) Jurnal Riset Rumpun Ilmu Pendidikan (JURRIPEN) Jurnal Pengabdian Masyarakat dan Riset Pendidikan
Nerli Khairani
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Humanities Education Languange, Linguistic, Communication & Media Mathematics Other

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Application of Eliciting Activities (MEA) Model Learning with a Scientific Approach to Improve Mathematical Representation Skills Dasrin Pohan; Sahat Saragih; Nerli Khairani
PARADIKMA: JURNAL PENDIDIKAN MATEMATIKA Vol 17, No 1 (2024): PARADIKMA JURNAL PENDIDIKAN MATEMATIKA (January-June 2024)
Publisher : Study Program of Mathematics Education of Unimed Postgraduate Program

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/paradikma.v17i1.53977

Abstract

This research aims to determine: (1) To examine the differences in increasing representational abilities and mathematical learning independence for students who are given learning using the activity elicitation model and students who are given scientific learning. (2) To learn about the process of responding to kids who learn utilizing the activity elicitation approach. Those who approach learning scientifically. This is an example of experimental study. This study's population consisted of all pupils in class VIII of SMP Asy-Syafiiyah Medan, and the research sample was drawn at random from two classes. The study's findings indicate that (1) beginning mathematics abilities have an impact on students' mathematical representation abilities and (2) abilities have an impact. Students' independence in early mathematical learning. The increase in mathematical representation abilities of students who get MEA learning and those who receive scientific approach learning differs. (2) Using the eliciting events learning model to complete student answers is superior to learning using a scientific approach. Thus, scientifically based learning activity elicitation models can be employed as an alternative in learning mathematics to increase mathematical representation abilities.
Implementasi Metode Period Order Qantity Dalam Pengendalian Persediaan Bahan Baku Crude Palm Oil Michael Simanjuntak; Nerli Khairani
JURNAL RISET RUMPUN ILMU PENDIDIKAN Vol. 2 No. 1 (2023): April : Jurnal Riset Rumpun Ilmu Pendidikan
Publisher : Lembaga Pengembangan Kinerja Dosen

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55606/jurripen.v2i1.811

Abstract

PKS Pagar Merbau is a plantation company engaged in palm oil processing. Due to the unpredictable level of demand, determining the timing and number of orders becomes difficult, resulting in increased inventory costs. By using the Period Order Quantity Method, it aims to be able to control Crude Palm Oil raw material inventory which will minimize inventory costs. The Period Order Quantity (POQ) method is a development of the Economic Order Quantity (EOQ) method where the number of orders can minimize the total cost of inventory. The results of applying this method, obtained the optimal number of orders of 1,208,798.12 kg for one order with a frequency of 101 times a year with a safety stock of 3,000,200.61 kg and a reorder point of 3,961,816.26 kg. The total inventory cost according to company policy is Rp. 3,159,298,770.65 while the total inventory cost according to the Period Order Quantity method is 2,879,961,532.42. Then the total inventory cost savings of Rp. 279,337,238.23 or 8.86%
Perencanaan Kebijakan Persediaan Vaksin Booster Dengan Metode Continuous Review (s,S) Untuk Mengurangi Overstock Di Rumah Sakit Tentara Kota Pematangsiantar Renata Hany; Nerli Khairani
JURNAL RISET RUMPUN MATEMATIKA DAN ILMU PENGETAHUAN ALAM Vol. 2 No. 2 (2023): Oktober : Jurnal Riset Rumpun Matematika dan Ilmu Pengetahuan Alam
Publisher : Pusat riset dan Inovasi Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55606/jurrimipa.v2i2.1180

Abstract

Pematangsiantar City Army Hospital is one of the state-owned health facilities that provides booster vaccination services with 4 types of booster vaccines available, namely sinovac, astrazeneca, pfizer and moderna. The uncertain level of demand for booster vaccines causes the Pematangsiantar City Army Hospital to require booster vaccine inventory policy planning using the continuous review (s,S) method to prevent overstock which results in considerable cost expenditures. From the calculation of booster vaccine inventory control using the continuous review method (s,S), it is obtained that the total inventory cost has a significant percentage change. For the type of sinovac, the percentage change in total inventory costs reaches 92% of the total inventory costs in the existing conditions, for astrazeneca reaches 58% of the total inventory costs in the existing conditions, for pfizer reaches 60% of the total inventory costs in the existing conditions, and for moderna reaches 95% of the total inventory costs in the existing conditions. The results of the calculation of the total cost of inventory with continuous review (s,S) can provide a decrease in costs incurred by the Pematangsiantar City Army Hospital. This is because the continuous review (s,S) inventory policy minimises the cost of vaccine shortages which are quite costly.
Analisis Biaya dan Tingkat Layanan Sistem Antrian Call Center Menggunakan Model M/M/S: Penelitian Nerli Khairani; Rizky Suhaila Hsb; Septika Aulia Putri; Sesy Ophelia Tampubolon
Jurnal Pengabdian Masyarakat dan Riset Pendidikan Vol. 4 No. 2 (2025): Jurnal Pengabdian Masyarakat dan Riset Pendidikan Volume 4 Nomor 2 (October 202
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jerkin.v4i2.3117

Abstract

This study aims to analyze cost optimization and service level in a call center queueing system using the M/M/S model. The main problem addressed is the imbalance between operational cost efficiency and customer service quality in determining the optimal number of servers. The research applies a quantitative approach with a case study design based on 1,251 historical observations of call center performance. Data were analyzed using the M/M/S queueing model with arrival and service rate parameters of 8.27 customers per hour and 22.85 customers per hour per server, respectively. The results indicate that the two-server configuration is the optimal solution, achieving a 96.8% service level and an operational cost of Rp 56,601 per hour, meeting industry standards while maintaining cost efficiency. This configuration yields a 45.3% improvement in service level compared to one server with a 61.8% cost increase, while adding a third server provides only marginal improvement. The findings provide practical implications for call center management in balancing financial and service quality aspects. In addition, this study offers educational value as a learning resource in applied mathematics and operations research courses.
Co-Authors Dasrin Pohan Michael Simanjuntak Renata Hany Rizky Suhaila Hsb Sahat Saragih Septika Aulia Putri Sesy Ophelia Tampubolon