Stock And Flow Diagram of Supply-Prices Stabilization Model of The Chicken Meat Industry Supply Network: A Case Study In Daerah Istimewa Yogyakarta (DIY)

During the Covid-19 pandemic, the government issued a policy through Large-Scale Social Restrictions and the impact was felt on the unsustainable availability of various food commodities, one of which was broiler chicken meat. Broiler chicken is one of the animal protein food products that is favored by people from various circles because it has a relatively cheaper price compared to other meat commodities that provide animal protein, is easy to obtain, and has good organoleptic quality. The purchasing power of the people of the Special Region of Yogyakarta (DIY) is also increasing due to increased nutritional awareness related to the fulfillment of animal protein. The broiler production process contains uncertainty because it is seasonal. This causes a fluctuating price change. Fluctuations in broiler prices are not a new phenomenon in the DIY. Price fluctuations usually occur at certain times such as during religious holidays and this phenomenon occurs repeatedly every year. So we need a broiler supply chain research to maintain price stability using a dynamic simulation system model of the broiler chicken supply chain in DIY. This study develops a Causal Loop Diagram (CLD) and Stock and Flow Diagram (SFD) of system dynamic model of the broiler supply chain in the DIY and simulates the model using Powersim Studio 10 software. The simulation is confirmed verified and valid, therefore for the next research model can be used to solve the problem by generating policy scenario.

ANALISIS DAN PEMODELAN DINAMIS PENGGUNAAN KENDARAAN BERMOTOR DI UNIVERSITAS MA CHUNG

Jumlah civitas akademik Universitas Ma Chung yang semakin meningkat setiap tahunnya, membuat jumlah kendaraan bermotor milik pribadi baik roda dua maupun roda empat meningkat pula. Peningkatan jumlah kendaraan tersebut akan menyebabkan jejak karbon. Langkah Universitas Ma Chung untuk melakukan penyegahan jejak karbon yang terus menerus meningkat tersebut adalah mengadakan program kampus berwawan lingkungan (Eco Campus). Dalam mencapai hal tersebut dilakukan rancangan causal loop diagram, simulasi pemodelan sistem dinamis (stock and flow diagram) dengan software Stella untuk mendapatkan skenario usulan terbaik. Berdasarkan hasil penelitian didapatkan skenario usulan terbaik berupa pelaksanaan hari bebas kendaraan (car free day) dua kali dalam sebulan. Melalui skenario usulan tersebut didapatkan hasil perhitungan stock and flow diagram total nilai tapak karbon kendaraan bermotor di Universitas Ma Chung berkurang sebesar 517,2 ton of kg CO2untuk satu tahun kedepan dari kondisi awal.