The effect of word-of-mouth marketing strategy on the number of buyers: a mathematical perspective

In this paper we will present a mathematical model for word of mouth marketing strategy by considering proportional recruitment. We divide a population under consideration into four subpopulations: susceptible – those who are the target market or potential buyers (S), infected – those who are already active as buyers (I), positive – former buyers which have positive comments on the item they purchased (P)  and negative – former buyers which have negative comments on the item they purchased (N). We assume that the rate of new individuals who enter the target market is proportional to the number of S, I, P, and N subpopulations. These subpopulations have either a positive or negative contribution to the number of new entry to the susceptible class or the potential buyer. We analyzed the model emphasizing in the effects of the WOM on the number of buyers and its rate of increase

Analisis Kegagalan Operasional Mesin Chiller dengan Metoda FTA dan FMEA

        Mesin air chiller adalah bagian dari sistem penyediaan dan penyediaan udara bersih dan dingin ke area bangunan. Kerusakan pada komponen mesin chiller telah mengurangi pasokan udara dingin ke area Mall. FTA (Fault Tree Analysis) dan FMEA (Failure Mode dan Effect Analysis) digunakan untuk melacak kasus-kasus kegagalan chiller engine, dengan penekanan pada analisis "pendekatan top-down", yang merupakan analisis menyeluruh mulai dari sistem tingkat atas dan meneruskannya turun, sehingga diharapkan dapat menjadi solusi yang tepat dalam menangani masalah pasokan udara dingin ke gedung Mall, dan dengan metode itu diharapkan juga dapat memberikan proposal dari penjadwalan pemeliharaan dengan membedakan perilaku penjadwalan sesuai dengan tingkat kritis dari masalah setiap unit komponen mesin chiller

The influence of information technology and organizational culture on the quality of management accounting information systems

This research aims to study information technology and culture on the quality of management accounting information systems in the Bandung city government cooperative. This research uses descriptive verification research method by using the PLS (Partial Least Square) test. Data collected through a questionnaire distributed to employees of the Bandung city government cooperative. The results of  this study are expected  to be a  solution  to the problem  of  technology and organizational culture in the cooperative of Bandung city government employees. The results of this study refer to: information technology relating to the quality of management accounting information systems, and organizational culture related to the quality of management accounting information systems

The influence of information technology and organizational culture on the quality of management accounting information systems

This research aims to study information technology and culture on the quality of management accounting information systems in the Bandung city government cooperative. This research uses descriptive verification research method by using the PLS (Partial Least Square) test. Data collected through a questionnaire distributed to employees of the Bandung city government cooperative. The results of  this study are expected  to be a  solution  to the problem  of  technology and organizational culture in the cooperative of Bandung city government employees. The results of this study refer to: information technology relating to the quality of management accounting information systems, and organizational culture related to the quality of management accounting information systems

ANALISIS PEREMAJAAN ANGKUTAN KOTA Studi Kasus : Angkot Trayek Margahayu Raya – Ledeng

Dalam paper ini dibahas suatu model matematika untuk peremajaan angkutan kota. Model yang dibentuk berupa model yang kontinu. Model kemudian diaplikasikan untuk menentukan umur ekonomis angkutan kota trayek Margahayu Raya – Ledeng di Bandung, dalam kaitannya dengan peremajaan angkutan kota yang bersangkutan. Lebih jauh lagi umur ekonomis yang diperoleh ini kemudian dibandingkan dengan berbagai skenario, seperti tingkat suku bunga yang berbeda, tingkat utilitas yang berbeda dan harga bahan bakar minyak yang berbeda. Kata kunci : Umur Ekonomis, Peremajaan Angkutan Kot

The economic aspects of internet of things for a public transport system

This paper study the economic aspects of the application of Internet of things (IoT) for vehicle used to support operations in the public transportation system. A vehicle will experience deterioration (decreased reliability) with the rate of use and age. To maintain high availability and improve vehicle reliability, condition-based maintenance is used to reduce the occurrence of damage and downtime. The degradation process is considered to be influenced by age, usage and operating condition. The use of the IoT has been proved to be economically feasible in reducing the cost of maintenance

Cost analysis of warranty based on lemon law with multiple failures and total downtime

Analysis of warranty costs is a topic that is widely studied in various finished product industries. One type of warranty that applies is a product warranty under Lemon Law. This guarantee under Lemon Law applies a lot to automotive products such as cars. Lemon Law is a law that protects consumers from poor quality new goods that are not in accordance with related product standards but can reach consumers. With this Lemon Law, consumers can return products that are proven to have a lemon condition in the hands of producers to then get a refund (replacement ) or replacement with a new similar product ( replacement ). The product can be claimed in a lemon condition if: (1) the car has been returned to the dealer four times because it needs to be repaired on the same problem / faulty part, but the dealer is unable to fix it satisfactorily; or (2) the car has been out of service for more than 30 days due to one or more damage. Analysis of warranty costs in this study includes replacement cases with compliance with conditions (1) only, replacement cases with fulfillment of conditions (2) only, and replacement cases with fulfillment of conditions (1) and conditions (2). A simulation method is designed to illustrate variations in the condition of the damage to the car during the warranty period as well as variations in repair time when damage occurs based on a particular distribution. The algorithm of the simulation is then modified and developed to determine the expected cost that fulfill the conditions (1) and (2)

Non-cooperative and cooperative solutions of government subsidy on public transportation

The paper deals with two models of government subsidy given to a public transport operator: (i) the subsidy for buying bus from an appointed public transport manufacturer, and (ii) the subsidy for reimbursing reduced ticket price for passengers. The models are developed to determine the maximum profit for both the public transport operator and the manufacturer. Since we consider two parties – the public transport operator and the manufacturer of the bus, then we use game theoretical approach by considering non-cooperative and cooperative solutions. Furthermore, since the bus is repairable we consider virtual age to model the preventive maintenance and we consider minimal repair to model the corrective maintenance. We analyse both type of subsidy models and give some numerical examples which show the effects of different subsidies to the profit of operator and manufacturer. The result of the numerical examples indicates that reducing ticket price would give a higher profit both to the operator and the manufacturer

The economic aspects of internet of things for a public transport system

This paper study the economic aspects of the application of Internet of things (IoT) for vehicle used to support operations in the public transportation system. A vehicle will experience deterioration (decreased reliability) with the rate of use and age. To maintain high availability and improve vehicle reliability, condition-based maintenance is used to reduce the occurrence of damage and downtime. The degradation process is considered to be influenced by age, usage and operating condition. The use of the IoT has been proved to be economically feasible in reducing the cost of maintenance

Kincir Air Bambu Ikon Kampung Wisata Edukatif Desa Ciburial

Development does not always have a positive impact on the life of an area. The level of development in general is always inversely proportional to sustainability. As evidence of the reduction in open green land because there have been many increases in the number of shopping centers, and hotels which are one of the means of city tourism. Or, long and sustainable impacts such as climate change and air temperatures and the depletion of groundwater supplies which results from the increasing number of residential developments that are part of the economic development of the people of Bandung. North Bandung area which is essentially a water catchment area and conservation area in the city of Bandung was not separated from the impact of the development. The construction of luxury residences, public facilities such as hotels and restaurants and other artificial natural attractions have been built on open green land, conservation areas and water catchment areas. At Kampung Lebaksiuh, Desa Ciburial, Sub-district Cimenyan, Kabupaten Bandung which is in the northern Bandung region, is one of the few indigenous settlements that still maintain the function of conservation and water catchment areas. With the various problems above, this community service activity aims to make a waterwheel as one of the educational tools for visitors, especially children who come to visit the Lebaksiuh Tourism Village, Desa Ciburial, Sub-district Cimenyan, Kabupaten Bandung