Wahyudi Sutopo
Sebelas Maret University
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Featured researches published by Wahyudi Sutopo.
international conference on electrical engineering | 2014
Nur Atikah; A. H. Al Ghabid; Wahyudi Sutopo; Agus Purwanto; M. Nizam
Sebelas Maret University (UNS) as a member of a consortium team for developing national electric vehicle (Mobil Listrik Nasional, hereinafter referred to as Molina), is developing a lithium battery technology. This technology is prepared as the main energy storage in electric vehicle (EV), which are being developed by the team, which is called SmarT EV. Currently, the technology is in the technology development stage for commercialized, with the value of the technology readiness levels (TRLs) is on 6 (Prototype demonstrated in field systems). Intended outcome of this development stage is the technology can be commercialized in a university spin-off scheme, with the TRLs - value on 9 (ready to commercialize). In an effort to continue the process of commercialization that has been done, this study develops the technical feasibility based on Goldsmith commercialization model. By mapping the correlation of technical feasibility and the TRLs concept, assessing the feasibility of the technology can be made with minimum value is equal to 80% of the fulfillment of the indicators for each stage of TRLs. As a result, the technical feasibility can meet the 7th level of TRLs.
industrial engineering and engineering management | 2013
Fitra Lestari; K. Ismail; A. B. Abdul Hamid; Wahyudi Sutopo
Business strategies of palm oil supply chain include linkages between plantation as suppliers, milling, refining and customer. Case study on palm oil refinery shows the distribution of product from supplier to customer has a pattern that can be standardized into operational procedures within business processes. This paper aims to present the implementation methodology of SCOR Model based case study on palm oil refineries using the software Process wizard. The methodology can facilitate the blending of business objective, strategy, process and technology in the supply chain. The result shows SCOR templates is very useful tool for the design of a supply chain configuration and also provide the ability to improve the system through best practice projects. It is necessary to note that the software Process wizard can be used as a tool for analyzing configuration operations of the supply chain.
industrial engineering and engineering management | 2013
R. Ardiansyah; Wahyudi Sutopo; M. Nizam
Accurate estimation is still challenging for the development stage of a product due to lack information about the production process, bill of material, and detailed activity. Parametric cost estimation based on activity-based costing can be used to generate the cost information of the whole process from the design stage until development stage. This paper presents a parametric cost estimation model that links activity-based costing to enhance accuracy of estimation for developing an electric vehicle prototype. The parametric cost represents the development process of a prototype consisting of four main processes. It also presents activities, cost center, and cost driver in each process. The total cost of each cost center is formulated by mathematical equations. A prototype of the Sebelas Maret Electric Vehicle is chosen as a case study. The proposed model can be utilized to predict total cost estimation the prototype of electric vehicle. This estimation method can influence cost reduction of developmental stage.
Archive | 2013
Wahyudi Sutopo; Muh. Hisjam; Yuniaristanto
Small-scale vegetables farmers have to deal with marketing and low selling price problems although they produce good quality of vegetables. The low prices are mostly because of the market information asymmetry. An agri-food supply chain (ASC) model that involves the corporate social responsibility (CSR) activities to empower the farmers as qualified supplier for modern retail (MR) is proposed to overcome the problems. The CSR activities are designed to enhance business skills and improve the quality of vegetables distribution system. For farmers, quality improvement of vegetable is expected to increase supply of vegetable to MR, whereas for MR to increase selling price and lengthen deterioration time of vegetable thus reducing the risk of unsold vegetable to consumer. Multi-objective optimization programming is developed to determine the amount supply, level of farmers training skills, quality improvement target, and the CSR total cost. The results show that both farmers and MR gain benefit from CSR activities although MR must allocate some amount of budget as CSR cost.
international conference on electrical engineering | 2014
Wahyudi Sutopo; N. Atikah; Agus Purwanto; D. P. T. D. Danardono; M. Nizam
Sebelas Maret University (UNS) as a member of a consortium team for developing national electric vehicle, is developing a lithium battery for energy storage in electric vehicle (EV). Currently, the technology is in the technology development phase for commercialized under the university spin off scheme. In the technology development phase, according to the Goldsmith commercialization model, price identification should be studied before proceeding to the next stage of commercialization. Therefore, this study develops a cost estimation model to assess the feasibility of developed product based on the suitability of the targeted cost by market with the estimated cost. Research approaches to develop the model is parametric method based on activity-based costing. This approach is made to enhance accuracy of the cost estimation. By providing a numerical example into the model, this study can predict the cost of lithium ion battery cell (30Ah). The feasibility assessment carried out by calculating the targeted cost from desire profit and targeted price of market. The targeted cost is calculated as the cut off value to assess the feasibility of the developed product. The developed product feasible, if the estimated cost is equal or less than the targeted cost.
industrial engineering and engineering management | 2011
Bobby Kurniawan; Muhammad Hisjam; Wahyudi Sutopo
This paper studies developing country teakwood production and supply chain under sustainability considerations. Although teak is a renewable resource, it requires long time to be harvested again. Furthermore, teak demand tends to increase from time to time. A teak production and supply chain model is developed to find optimal teak production and distribution that maximizes economical aspect, while maintaining renewable resource preservation and social benefit. Whole stand growth model is used to simulate growth of the planted forest. Linear fuzzy Chance Constrained Model (CCM) optimization is deployed to find the solution and implement uncertainty to production capacity, demand, and prices parameters. Simulation and optimization are recursively conducted for every period of time. The result shows that sustainability in teak industry can be achieved after rotation time.
international conference on electrical engineering | 2014
Yuniaristanto; D. E. P. Wicaksana; Wahyudi Sutopo; M. Nizam
Incubator as one of the mechanisms in the commercialization of technology plays an important role to commercialize the results of technology research in higher education. National electric car (Molina) as one of the results of university research commercialization requires a system to bring the results of research to the market. This paper aims to produce a model of the flowchart of the business process of commercialization university technology incubator. Flowchart generated from a combination of technology incubators in the world coupled with an interview with the manager of the incubator. The process consisted of 20 main steps and two large main commercialization process. The analysis result shows that the new business process of technology incubator model havs some advantage than the old model.
Archive | 2013
Muh. Hisjam; Achmad Habibie; Wahyudi Sutopo; Kuncoro Harto Widodo
Due to limited supply of high quality of teak log as raw materials for export oriented furniture industry in Indonesia, procurement plan becomes a critical operation. The furniture industry (manufacturer) buys high quality teak log from Perum Perhutani (supplier), a state-owned forestry company that has responsibility not only to supply teak logs but also to keep the environmental and social role of the forest in Indonesia. The manufacturer should also consider sustainability due to the demands of the stakeholders. This study proposes a relationship model between supplier and manufacturer for procurement plan and formulated as Goal Programming to get the most favorable solution considering economical, environmental, and social aspect both of supplier and manufacturer. The results show that the model can be used to determine the decision variables considering sustainability aspects.
Production & Manufacturing Research | 2018
Wahyudi Sutopo; Ayu Erliza; Anugerah Widiyanto; Raja Rizqi Apriandy; Ahad Ali
ABSTRACT Technopolis has close relationships to the development of science and technology park. Therefore, this research is intended to develop mathematical model for Promotion Policy Instrument (PPI) that can be implemented for investment promotion scheme by examining technopolis case in Indonesia. The model is formulated by adapting Game Theory Model (Model I) and Goal Programming Model (Model II). Three main activities group – productive, research and technology development, social activity and infrastructure – should be simultaneously developed. Game Theory model indicated that social activity and infrastructure projects are basically rejected due to negative payoff. While Goal Programming Model, by given 3 alternatives condition, shows that each alternative only give benefit to only one activity. Sensitivity analysis reveals the ability of the models in responding the possible adjustment towards uncontrollable input. The models from PPI scheme in KTP can also be implemented as the benchmarking to develop science and techno park in another location.
Archive | 2018
Viny Sartika; Muh. Hisjam; Wahyudi Sutopo
The newspaper industry has several distinctive features that make it stands out from other industries. The strict delivery deadline and zero inventory led to a very short time frame for production and distribution. On the other hand, there is pressure from the newsroom to encourage the start of production as slowly as possible in order to enter the news, while there is pressure from production and distribution to start production as early as possible. Supply chain risk management is needed in determining the best strategy for dealing with possible risks in the newspaper industry. In a case study of a newspaper in Surakarta, quantitative approaches are made to the newspaper supply chain risk management by calculating the expected cost of risk based on the magnitude of the impact and the probability of a risk event. From the calculation results obtained that the five risks with the highest value are newspaper delays to the end customer, broken plate, miss print, down machine, and delayed delivery of newspaper content. Then analyzed appropriate mitigation strategies to cope with such risk events.The newspaper industry has several distinctive features that make it stands out from other industries. The strict delivery deadline and zero inventory led to a very short time frame for production and distribution. On the other hand, there is pressure from the newsroom to encourage the start of production as slowly as possible in order to enter the news, while there is pressure from production and distribution to start production as early as possible. Supply chain risk management is needed in determining the best strategy for dealing with possible risks in the newspaper industry. In a case study of a newspaper in Surakarta, quantitative approaches are made to the newspaper supply chain risk management by calculating the expected cost of risk based on the magnitude of the impact and the probability of a risk event. From the calculation results obtained that the five risks with the highest value are newspaper delays to the end customer, broken plate, miss print, down machine, and delayed delivery of newspap...