scholarly journals ANALISIS DAN PEMODELAN DINAMIS PENGGUNAAN KENDARAAN BERMOTOR DI UNIVERSITAS MA CHUNG

2019 ◽  
Vol 14 (2) ◽  
pp. 43-50
Author(s):  
Yuswono Hadi ◽  
Oktavia Anisa Rawindra
Keyword(s):  
Flow Diagram ◽  
Causal Loop Diagram ◽  
Loop Diagram ◽  
Causal Loop ◽  
Stock And Flow Diagram

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.

scholarly journals PENENTUAN STRATEGI BERSAING BERDASARKAN SIMULASI SISTEM DINAMIS ( Studi Kasus di Industri Kecil Intan Rahmadhani Yogyakarta )

OPSI ◽  
2018 ◽  
Vol 11 (1) ◽  
pp. 58
Author(s):  
Susi Dwi Rahayu ◽  
Dyah Rachmawati Lucitasari ◽  
Sutrisno Sutrisno
Keyword(s):  
Flow Diagram ◽  
Causal Loop Diagram ◽  
Loop Diagram ◽  
Causal Loop ◽  
Stock Flow

Industri kecil Intan Rahmadhani merupakan salah satu industri makanan yang menjual produk berupa kripik tempe dan beberapa produk kripik lainnya yang berbahan baku dari sayuran dan biji-bijian. Permasalahan yang dihadapi industri Intan Rahmadhani saat ini adalah persaingan industri yang tinggi dan penjualan produk yang terus menurun. Penelitian ini bertujuan untuk menentukan strategi bersaing yang dapat digunakan dalam menghadapi persaingan maupun memperbaiki kondisi yang sedang dialami industri Intan Rahmadhani. Penelitian ini diawali dengan menganalisis strategi yang sesuai dengan kondisi internal maupun eksternal industri Intan Rahmadani. Hasil dari analisis diperoleh tiga strategi yaitu inovasi produk, promosi dengan diskon, dan penjualan online. Strategi yang diperoleh dimodelkan berdasarkan simulasi sistem dinamis dengan software powersim. Pada pemodelan strategi dilakukan penyusunan causal loop diagram dan stock flow diagram untuk melihat hubungan timbal balik antar valiabel. Hasil dari simulasi dilakukan uji validasi menggunakan uji rata-rata (mean comparison). Pada penelitian ini pembangkitan skenario didasarkan pada hasil dari analsis strategi.Berdasarkan pengujian tingkat error, rekomendasi strategi yang tepat untuk industri Intan Rahmadhani adalah strategi pertama yaitu inovasi produk. Inovasi produk yang dilakukan adalah  menambah varian rasa produk coklat dan BBQ dengan harga jual yang sama yaitu sebesar Rp 7.500,-

scholarly journals Close the Loop! System Dynamics Modelling in Service Design

Systems ◽  
2018 ◽  
Vol 6 (4) ◽  
pp. 41
Author(s):  
Eva Svirakova
Keyword(s):  
System Dynamics ◽  
Research Methods ◽  
Service Design ◽  
Flow Diagram ◽  
Causal Loop Diagram ◽  
Loop Diagram ◽  
Causal Loop ◽  
Grounded Theory Method ◽  
Innovative Solution ◽  
Axial Coding

Service design is a thought process using creativity, empathy in responding to a customer’s need and rationality in an analysis of a recommended, innovative solution. In this paper, we propose a research methods system which enables designers to integrate design and systems thinking into a system dynamics model of a creative project. Based on these research methods, topics and problems can be detected, and solutions can be proposed. The communicative game “Close the Loop!” which uses elements of visual language, and modifies the Grounded Theory method and its three processes: open coding, axial coding, and selective coding. The aim of the game is to create a Causal Loop Diagram which expresses a dynamic hypothesis, a Stock and Flow Diagram, which solves the problem visually and follows the Causal Loop Diagram. The accuracy of this set of method is demonstrated by its application in a case study from the service area. The article is intended for researchers who endeavour to use research methods in order to improve their services and meet a customer’s requirements.

Nuclear Penetration for a Deregulated Electricity Market for Peninsula Malaysia: A Systemic Feasibility Analysis

2019 ◽  
Vol 4 (1) ◽  
pp. 9-18
Author(s):  
TANG Suet Yee ◽  
TAN Andrew Huey Ping ◽  
YAP Eng Hwa
Keyword(s):  
System Dynamics ◽  
Electricity Market ◽  
Energy Security ◽  
Nuclear Power ◽  
Flow Diagram ◽  
Causal Loop Diagram ◽  
Loop Diagram ◽  
Causal Loop ◽  
Deregulated Electricity Market ◽  
Business As Usual

Objective - This paper aims to investigate the feasibility of employing nuclear power in peninsula Malaysia, within the context of a deregulated electricity market framework. Methodology/Technique - System dynamics modelling and simulation has been adopted in this research. A qualitative causal loop diagram, which represent the relationships of key factors in the dynamics of nuclear power in peninsula Malaysia's electricity market, was first constructed. It is divided into three sections: (1) investment decisions, (2) power generation, and (3) maintaining business as usual. The causal loop diagram is converted into stock and flow diagram, where variables are quantified by input values and equation before simulated for a set period of 38 years. Three scenarios were designed to facilitate the research: (A) business, as usual, (B) nuclear power expansion, and (C) renewable energy expansion. Findings - Simulations showed that scenario B can potentially strengthen the region's energy security under specific conditions in addressing capacity redundancy and emissions reduction. Also, having a diverse market is paramount in contributing to the responsiveness of the market. Novelty - A systemic and dynamic understanding of the implications of two energy scenarios on the country has been established. Type of Paper: Empirical Keywords: Energy Security; Electricity Market; Deregulation; System Dynamics; Nuclear Power.

MODEL STRUKTUR EKONOMI RUMAH TANGGA PETANI PADI DI KABUPATEN INDRMAYU, PROVINSI JAWA BARAT (Suatu Analisis Menggunakan Sistem Thinking)

2016 ◽  
Vol 1 (1) ◽  
pp. 071
Author(s):  
Ivonne Ayesha
Keyword(s):  
System Thinking ◽  
Causal Loop Diagram ◽  
Loop Diagram ◽  
Causal Loop

Tujuan penelitian ini adalah untuk membangun pemahaman (understanding) tentang fenomena ekonomi rumah tangga petani penggarap secara clear dan distinct, dan menyusun model ekonomi rumah tangga petani penggarap yang dapat menjelaskan faktor-faktor yang penentu dan interaksi variabel-variabel yang saling terkait. Penelitian ini bersifat kualitatif dengan jenis studi fenomenologi. Responden dalam penelitian ini adalah petani padi yang tidak punya lahan (penyakap) yang melakukan usahatani di Kabupaten Indramayu, Provinsi Jawa Barat, sebanyak 7 orang dengan lokasi yang berbeda, namun masih dalam kabupaten yang sama. Di samping itu, responden juga diambil dari perangkat desa, tokoh masyarakat, dan PPL. Responen ditetapkan secara sengaja (purposive), sesuai dengan kebutuhan penelitian ini. Data yang digunakan adalah data primer, sedangkan analisis data menggunakan cara berfikir sistem (system thinking). Hasil analisis data ditampilkan dalam bentuk diagram sebab akibat (causal loop diagram), dengan menggunakan program Vensim PLE. Hasil penelitian menyimpulkan: 1) Rumah tangga petani penyakap sebagai unit ekonomi terkecil yang memiliki sumber pemasukan dan pengeluaran rumah tangga, baik dari dan untuk memenuhi kebutuhan usahatani maupun non usahatani. Meskipun nilai penerimaan yang diperoleh sangat sedikit, namun petani penyakap tetap melaksanakan usahatani padi dari musim ke musim. Kekurangan uang dalam rumah tangga diatasi dengan melakukan pinjaman ke para pelepas uang (rentenir) dan tengkulak. Sedikit sekali petani yang memanfaatkan jasa keuangan formal dalam mengatasi masalah ekonomi rumah tangga. Pola hidup konsumtif sering menyebabkan petani terjebak dalam lingkaran hutang, dan 2) Model ekonomi rumah tangga petani penyakap yang disusun mengandung 2 lingkar sebab akibat positif dan satu lingkar sebab akibat negatif. Lingkar sebab akibat positif terdapat pada struktur pinjaman usahatani dan struktur pinjaman non usahatani. Lingkar sebab akibat negatif terdapat pada struktur pengeluaran. Model ini menunjukkan bahwa uang dalam rumah tangga bertambah dengan adanya pemasukan dan berkurang dengan adanya pengeluaran. Variabel pemasukan merupakan akumulasi dari penghasilan bersih, pinjaman usahatani dan pinjaman non usahatani. Variabel pengeluaran ditentukan oleh total pengeluaran rumah tangga. Total pengelaran rumah tangga merupakan akumulasi dari: pengeluaran usahatani, pengeluaran non usahatani, pembayaran iyuran desa, biaya sosial, konsumsi rumah tangga, dan pembayaran hutang non usahatani

Modelling environmental and economic sustainability of logistics

2019 ◽  
Vol 12 (1) ◽  
pp. 73-94
Author(s):  
Pragya Arya ◽  
Manoj Kumar Srivastava ◽  
Mahadeo P. Jaiswal
Keyword(s):  
System Dynamics ◽  
Economic Performance ◽  
Economic Sustainability ◽  
Causal Loop Diagram ◽  
Bottom Line ◽  
Data Set ◽  
Content Type ◽  
Loop Diagram ◽  
Causal Loop ◽  
Model Based

Purpose Research on sustainability has progressed from a singular focus on one aspect to a simultaneous focus on more than one aspect of the triple bottom line. However, there is a dearth of research that explains why sustainability-related decisions in business often do not bear the expected results. Research that provides managers with a tool to achieve environmental sustainability of logistics without compromising the economic sustainability is scarce. Hence, the purpose of this paper is to bridge the above gaps and to explore the factors that affect investment in technology to balance environmental and economic sustainability of logistics. A model based on system dynamics approach explains the simultaneous interplay of these factors. Simulating the model helps the managers of logistics function decide the size of investment in technology, to achieve environmental efficiency without negatively influencing the economic performance. Design/methodology/approach A model based on system dynamics approach explains the simultaneous interplay of these factors. Simulating the model helps the managers of logistics function decide the size of investment in technology, to achieve ecological efficiency without compromising with the economic performance. Findings Collaboration with regulatory authorities and with players within the same industry and across industries is a must so that eco-logistics does not become an economic burden for businesses. The decision to invest in technology for eco-logistics is further accentuated if the technology promises some added economic benefits. Research limitations/implications From a theoretical perspective, the research has added to the less extensive literature on system dynamics modelling, which is a mixed methodology, combining both qualitative and quantitative techniques. The research is also one of the few attempts that have attempted to simultaneously study more than one aspects of sustainability in business, quantitatively through simulation. Simulation was demonstrated through a single case study, Future works can aim to apply the causal loop diagram to firms in varied sectors. Practical implications The managers can use the causal loop diagram to assess the environmental performance of logistics and decide on appropriate level of investment to balance ecological and economic performance of logistics. Originality/value The causal loop diagram has been developed through primary data collection via semi-structured interviews. The results were validated by presenting them to respondents to ensure they represent their view points. The results are, therefore, practical and original. This research does not build upon an existing data set or aims to test the applicability of any existing model. The model for this research has been developed from the grass-roots level.

Analysis of crowd stampede risk mechanism

Kybernetes ◽  
2019 ◽  
Vol 48 (1) ◽  
pp. 124-142 ◽  
Author(s):  
Xie Kefan ◽  
Yu Song ◽  
Sishi Liu ◽  
Jia Liu
Keyword(s):  
Deep Level ◽  
Fundamental Solutions ◽  
Causal Loop Diagram ◽  
Content Type ◽  
Loop Diagram ◽  
Causal Loop ◽  
Critical Data ◽  
Systemic Analysis ◽  
Linkage Effect ◽  
A Chain

Purpose The purpose of this paper is to analyze the crowd stampede risk mechanism from the perspective of systems thinking. Design/methodology/approach Causal loop diagram is drawn to outline the non-linear interactions among complex factors across the whole system and dissect the contributory factors of crowd stampede accident. To systematically construct the theoretical framework and find fundamental solutions, co-word analysis with Citespace is used to get the critical data. An agent-based simulation using Pathfinder is conducted to develop a spatial model for the Shanghai Stampede Accident that happened in 2014. Findings The causal loop diagram is formed to not only illustrate the symptomatic solutions with a quick fix but also dissect the fundamental solutions through an underlying systemic analysis. The simulation shows that crowd stampede experiences an interactive process of accumulation, trigger, delay, break and diffusion of risk factors within the crowd system. A linkage effect among the multidimensional characters of individuals and the system accelerates the stampede risk deterioration. There exists delay of the result of effect from the deep-level measure. Practical implications A top-down approach is offered to policymakers for crowd stampede risk protocol design and synergic emergency control that may reduce the risk of the stampede. Originality/value In this study, SDFT paradigm is proposed as the critical solution for the crowd stampede accident. In addition, a chain effect of energy and a linkage effect within the crowd system is illustrated for in-depth understanding of crowd stampede risk.

Toward a Pattern Language for Eco-Business Design

2014 ◽  
Vol 8 (5) ◽  
pp. 706-715 ◽  
Author(s):  
Shinsuke Kondoh ◽  
◽  
Hitoshi Komoto ◽  
Yusuke Kishita ◽  
Nobuo Nakamura ◽  
...  
Keyword(s):  
Pattern Language ◽  
Causal Loop Diagram ◽  
Multiple Stakeholders ◽  
Loop Diagram ◽  
Causal Loop ◽  
Surrounding Environment ◽  
Business Cases ◽  
Key Features ◽  
Business Design

The objective of this study is to seek a pattern language in the domain of eco-business design. A pattern language is first proposed in the field of architecture. By using patterns as the basis for a shared agreement in a community, users and stakeholders in the community can design buildings and their surrounding environment in a cooperative manner. This paper first discusses key features of the language that enables a cooperative eco-business design among multiple stakeholders. It goes on to describe how to formulate the language by using a causal-loop diagram as well as rules that were established by analyzing 130 eco-business cases in Japan. A simplified case study is also provided to illustrate how to use the language.

Fight or flight: using causal loop diagram to investigate brain drain in developing countries

2010 ◽  
Vol 2 (3) ◽  
pp. 285 ◽  
Author(s):  
Hamid Reza Lashgarian Azad ◽  
Hadi Akbarzade Khorshidi ◽  
Seyed Hossein Hosseini ◽  
Saeed Mirzamohammadi
Keyword(s):  
Developing Countries ◽  
Brain Drain ◽  
Causal Loop Diagram ◽  
Loop Diagram ◽  
Causal Loop ◽  
Fight Or Flight
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