Yusuf Priyandari
Fakultas Teknik, Jurusan Teknik Industri, Universitas Sebelas Maret. Jl. Ir. Sutami 36 A, Surakarta 57126

Published : 22 Documents
Articles

Found 22 Documents
Search

Penentuan Rute Pengiriman Pupuk Urea Bersubsidi di Karanganyar Priyandari, Yusuf; ., Yuniaristanto; Christiawan, Yahuda Patria
Jurnal Teknik Industri Vol 13, No 1 (2011): JUNE 2011
Publisher : Institute of Research and Community Outreach - Petra Christian University

Show Abstract | Original Source | Check in Google Scholar | Full PDF (275.392 KB)

Abstract

This paper develops a vehicle routing problem (VRP) model for determining the routes in urea fertilizer distribution from a depot to retailers. The distribution is done in work days which uses trucks, each truck can serve more than one route (multiple trips), and each retailer has a time window. The vehicle routing model is built in a mixed integer linear programming (MILP) and the objective function is minimizing total transportation cost. The distances from the distributor to retailers and inter-retailers do not use Euclidian approach but the road network on a digital map in order to make the route solution is more realistic. Historical distribution data was used to test the model. The result shows that the model can minimize the cost about 2.28% which is compared to the original routes.
Perancangan Key Performance Indicators (KPI) Menggunakan Metode Performance Prism (Studi Kasus di Batik Putra Bengawan) Budijanto, Murman; Priyandari, Yusuf; Sari, Santi Embun
Performa: Media Ilmiah Teknik Industri Vol 11, No 2 (2012): PERFORMA Vol. 11, No 2 September 2012
Publisher : Program Studi Teknik Industri, Universitas Sebelas Maret

Show Abstract | Original Source | Check in Google Scholar | Full PDF (280.737 KB)

Abstract

The research is aim to design the Key Performance Indicators (KPI) using Performance Prism Method with a case study of a batiks production house namely Batik Putra Bengawan. The research might assist the Batik house to translate the stakeholders’ satisfactions and contributions into organization objectives, strategies, business processes and capabilities. The level of achievement in each factor could be indicated through several performance indicators (PI). Then the importances of the stakeholders’ concern, organization objectives and the PI are measured using a concept that could accommodate a linkage among them namely the Analytical Hierarchy Process (AHP). By doing so, the KPI might be set based on the ten most importance PI such that the performance improvement could be done effectively. This PI design indicates the 25 PI spread over 12 objectives, 23 strategies, 19 business processes, 19 capabilities and includes six stakeholders. The importances wighted using AHP shows that the stakeholder employee has the highest importance and the community gets lowest importance level. The ten most importance PI are choosen as the KPI of the Batik Putra Bengawan. These are the employee productivity, the order fulfillment, the net profit margin, the absentism, number of loyal customers, the bonus receivers among employees, the ratio of new customers, the feedback periods, the consumers’ satisfaction index and the ratio of defect products.
Tabu Search for the Vehicle Routing Problem with Multiple Trips, Time Windows, and Simultaneous Delivery-Pickup Suprayogi, Suprayogi; Priyandari, Yusuf
Jurnal Teknik Industri Vol 19, No 2 (2017): Desember 2017
Publisher : Institute of Research and Community Outreach - Petra Christian University

Show Abstract | Original Source | Check in Google Scholar | Full PDF (330.633 KB)

Abstract

This paper discusses a vehicle routing problem with multiple trips, time windows, and simultaneous delivery-pickup (VRPMTTWSDP). This problem is a variant of the basic vehicle routing problem (VRP) including the following characteristics: multiple trips, time windows, and simultaneous delivery-pickup.  In this paper, a solution approach based on tabu search (TS) is proposed. In the proposed TS, the sequential insertion (SI) algorithm is used to construct an initial solution. A neighbor structure is generated by applying an operator order consisting of eleven operators of relocation, exchange, and crossover operators. A tabu solution code (TSC) method is applied as a tabu restriction mechanism. Computational experiments are carried out to examine the performance of the proposed TS using hypothetical instances. The performance of the proposed TS is compared to the local search (LS) and the genetic algorithm (GA). The comparison shows that the proposed TS is better in terms of the objective function value.
Penentuan Frekuensi Perjalanan Angkutan Umum Batik Solo Trans untuk Mengoptimalkan Jumlah Pendapatan Damayanti, Ayu Sally; Priyandari, Yusuf; Jauhari, Wakhid Ahmad
Performa: Media Ilmiah Teknik Industri Vol 11, No 2 (2012): PERFORMA Vol. 11, No 2 September 2012
Publisher : Program Studi Teknik Industri, Universitas Sebelas Maret

Show Abstract | Original Source | Check in Google Scholar | Full PDF (281.861 KB)

Abstract

This research utilizes the rearrangement on trip frequency of Batik Solo Trans as the solution for increasing their daily revenue. The first phase of the trip rearrangement is identifying peak hours of Batik Solo Trans and analyzing data distribution of passengers’ quantity. Next, Monte Carlo simulation is applied for evoking the passenger quantity data as the basis on trip frequency calculation. There are three types of trip frequency which are calculated, minimum, maximum and service frequency. The service frequency is a threshold between revenue and operational cost. At the last phase, sensitivity analysis is applied on service frequency calculation. This research shows that a suggested frequency (service frequency) could be applied when tariff for a passengers and passenger quantity are remaining unchanged. Besides, if Batik Solo Trans still use the old trip frequency, it’s suggested that Batik Solo Trans considers rising the tariff.
Perancangan Sistem Informasi Portofolio Dosen di Jurusan Teknik Industri UNS Nugroho, Kristanto Agung; Iftadi, Irwan; Priyandari, Yusuf
Performa: Media Ilmiah Teknik Industri Vol 10, No 1 (2011): PERFORMA Vol. 10, No 1 Maret 2011
Publisher : Program Studi Teknik Industri, Universitas Sebelas Maret

Show Abstract | Original Source | Check in Google Scholar | Full PDF (603.567 KB)

Abstract

Portfolio lecturer required for the interests of each faculty and department. Portfolio lecturer required for promotion of faculty and lecturers certification. On the other hand, the portfolio required by the department faculty as an important part in the assessment of accreditation at the majors and is also used to compile Ekuivalensi Nilai Mengajar Penuh (EWMP). In this research, the initial system identification, system design proposal, and then to design the application. Identification of the initial system is to find problems early and identify the needs of the system the desired system, both input and output. The design of the proposed system consists of the design of the proposed system framework, design hardware and software, design development cost structure, and design calculations EWMP value. While the design phase consists of designing application interface and database design. Then, from the design interface is created between the face using the program Visual Basic 2008 and the design of the database created with MySQL database. The results of this study is information systems portfolio based computer that can print EWMP data, supporting the certification process lecturers, support the accreditation process majors, and supporting faculty promotion process. Designed system has a database for storing data and capable of storing a lecturer portfolio data from the KP and TA SIKAPTA databases and applications to enter and retrieve data as needed. Applications can be accessed by multiple users simultaneously via an internet connection. Through computer-based information systems, all lecturers EWMP activity will be recorded neatly, can be traced back and ready to print when needed. In addition, data can be managed more EWMP by lecturers to the process of certification and promotion.
Prototipe Alat Pemantauan Suhu untuk Rantai Dingin Produk Mengunakan Near Field Communication, Studi Kasus Distribusi Darah Priyandari, Yusuf; Suletra, I Wayan; Mas’ud, Azmi; Pujiharto, Adi Norrochmat
Jurnal Ilmiah Teknik Industri Vol. 16, No. 2, Desember 2017
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Original Source | Check in Google Scholar | Full PDF (207.838 KB)

Abstract

Temperature monitoring apparatus is required for the distribution of certain products that are distributed using cold chain method. Temperature gauges that use analog and digital thermometers can not store temperature data in transit. The digital temperature register apparatus (logger) in the market temperature is relatively expensive and does not provide early warning if the temperature in the storage box products out of permitted temperature limits. The research developed a prototype of a temperature monitoring device for the distribution of cold chain products. Case studies on blood distribution are used as a basis for determining the need for temperature monitoring devices. The product prototype is made by stages in accordance with generic product development method. The resulting prototype can provide temperature information in the cold box during the course of blood distribution. The prototype can also provide warnings in the form of sounds and lights when the temperature inside the cold box is outside the ideal temperature limit / permitted for the blood distribution process. Temperature history data during the trip can be stored in NFC Tags. The data can then be read using smart-phone devices that feature NFC.
Usulan Perencanaan dan Pengendalian Persediaan Obat pada Gudang Farmasi Klinik XYZ dengan Menggunakan Metode EOQ Buwono, Ringgo Ismoyo; Priyandari, Yusuf; Jauhari, Wachid Ahmad
Performa: Media Ilmiah Teknik Industri Vol 13, No 1 (2014): PERFORMA Vol. 13, No 1 Maret 2014
Publisher : Program Studi Teknik Industri, Universitas Sebelas Maret

Show Abstract | Original Source | Check in Google Scholar | Full PDF (512.543 KB)

Abstract

Klinik XYS is a company that provides health care services. This health care services include medical care and treatment services. In it’s function as a medical services provider, Klinik XYZ provides a pharmacy services. These services have an important role for the clinic because almost all of health services use pharmaceuticals. In the pharmaceutical activities, this company is still having some problem related to inventory management. From the initial observation,it is found that several types of drugs excess the stock which affect the expiration. Further, several types of drugs are out of stock which may result in reduction of patient services. Based on further observation the excess and the emptiness of drugs caused by company’s inability to control and plan the inventory. Therefore, this study proposes an EOQ method to plan and control the inventory in order to optimize the drug supply
Econometric Analysis With Panel Data: Measuring Relations And Contributions Of Influential Factors On Income Per Capita Across Districts In Sragen Regency Anugraha, Raditya Teguh; Suletra, I Wayan; Priyandari, Yusuf
Performa: Media Ilmiah Teknik Industri Vol 13, No 1 (2014): PERFORMA Vol. 13, No 1 Maret 2014
Publisher : Program Studi Teknik Industri, Universitas Sebelas Maret

Show Abstract | Original Source | Check in Google Scholar | Full PDF (408.925 KB)

Abstract

Levels of prosperity of an area is measured by income per capita. Income per capita is derived from regional income divided by mid-year population number. In Srgaen Regency, income per capita amongdistricts very different significanly so a reaserch is needed to know the causes of this variability. In general, many factors affect the income per capita and each factor may have different effect in form of relationship and level of contribution. To solve these problems this reaserch used econometric which is the result of a certain outlook on the role of economics, consists of the application of mathematical statistics to economic data to lend empirical support to the models constructed by mathematical economics and to obtain numerical results. Panel data which is a combination of data type cross-section and times series is used in this study. To combine the indicators variables that have different units is used factor analysis. Regression model pooled least square (PLS), fixed effect, and random effect was tested to get the most representative models describing the relationship between income per capita and the factors that influence. From the analysis it shown that not all district have the same model. Thus the Government of Sragen Regency can treatment on different district based on the factors that influence and encourage these factors so that the income per capita is increasing.
Evaluasi Potensi Bisnis Layanan Antar Jemput Sekolah Dasar Swasta Di Surakarta Rimadhani, Ajeng Sekar; Priyandari, Yusuf; Fahma, Fakhrina
Performa: Media Ilmiah Teknik Industri Vol 12, No 1 (2013): PERFORMA Vol. 12, No 1 Maret 2013
Publisher : Program Studi Teknik Industri, Universitas Sebelas Maret

Show Abstract | Original Source | Check in Google Scholar | Full PDF (334.802 KB)

Abstract

Ada 292 sekolah dasar yang terdapat di Surakarta baik sekolah dasar negeri maupun sekolah dasar swasta. Sekolah tersebut tidak hanya didominasi oleh siswa yang berasal dari kota Surakarta saja, namun juga terdapat siswa dari luar kota Surakarta. Kondisi itulah yang memunculkan adanya bisnis layanan antar jemput bagi siswa. Salah satu faktor yang menjadi pertimbangan dalam bisnis kendaraan antar jemput adalah biaya. Beberapa pihak pengelola mengalami kesulitan dalam menentukan besarnya biaya layanan antar jemput dikarenakan penentuan biaya yang sudah ada hanya menggunakan jarak terdekat dan terjauh. Oleh karena itu, untuk mengetahui kelayakan bisnis dan besarnya potensi layanan antar jemput perlu diadakan evaluasi. Evaluasi pada penelitian ini menggunakan studi kelayakan bisnis yaitu dengan menggunakan payback period, net present value dan IRR. Tahap awal evaluasi potensi bisnis ini adalah mengidentifikasi jumlah siswa yang menggunakan layanan antar jemput dan biaya layanan antar jemput. Tahap kedua adalah memetakan sebaran siswa layanan antar jemput dengan menggunakan GIS untuk mengetahui estimasi jarak tempuh. Kemudian, menghitung biaya per km sebagai dasar perhitungan kelayakan bisnis layanan antar jemput. Tahap terakhir adalah mengevaluasi kelayakan bisnis. Hasil evaluasi kelayakan bisnis layanan antar jemput berdasarkan studi kelayakan investasi diperoleh hasil untuk payback period sebesar 3 tahun 8 bulan lebih rendah dibandingkan ketentuan umur ekonomis 8 tahun. Net Present Value sebesar Rp 71.155.644 lebih dari 0. Nilai IRR sebesar 41% lebih tinggi dibandingkan suku bunga bank 12,38%
Evaluasi Usabilitas SIKAPTA Jurusan Teknik Industri UNS Menggunakan Hierarchical Task Analysis Iftadi, Irwan; Priyandari, Yusuf; Cahyaningrum, Fransiska Endah
Performa: Media Ilmiah Teknik Industri Vol 11, No 2 (2012): PERFORMA Vol. 11, No 2 September 2012
Publisher : Program Studi Teknik Industri, Universitas Sebelas Maret

Show Abstract | Original Source | Check in Google Scholar | Full PDF (239.566 KB)

Abstract

SIKAPTA is a computer based information system owned by department of industrial engineering, Sebelas Maret University (UNS). SIKAPTA is designed to manage course activities, specifically for Kerja Praktek and Tugas Akhir subject. SIKAPTA has not been evaluated since SIKPATA implementation, so it is important to evaluate specifically for usability problems. This research uses Hierarchical Task Analysis (HTA) approach in order to generate structured tasks for each user while they use SIKPATA and then uses the HTA of SIKAPTA as a bases to evaluate the usability of SIKAPTA. In addition to HTA, an usability guideline was developed and used to help SIKAPTA’s users to find the usability problems while they use SIKAPTA. The evaluation of SIKAPTA involved three kinds of user, they are administrator staff, students, and coordinator of Tugas Akhir. The result of this research shows that a mapping of users’s tasks using HTA can facilitate in conducting usability evaluations in detail for each application interface used for a task. In addition to that, the evaluation of SIKAPTA shows that there are 31 complaints said by users, which consists of 4 complaints from administrator, 13 complaints from student, and 14 complaints from coordinator of Tugas Akhir. The complaints represent usability problems and they are distributed in 3, 15 and 12 tasks for administrator, student, and coordinator of Tugas Akhir respectively.