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All Journal Jurnal Titra Dimensi Utama Teknik Sipil
Jani Rahardjo
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Civil Engineering, Building, Construction & Architecture Industrial & Manufacturing Engineering

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Penurunan Tingkat Kecacatan Produk di CV. Omega Plastics Robby Hadi Wijaya; Jani Rahardjo
Jurnal Titra Vol 1, No 2 (2013)
Publisher : Jurnal Titra

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Abstract

CV Omega Plastics is one of the companies which produced various plastic products for household. Reject rate for juventus shelf tray was 7%. The biggest reject rate was on injection process. Those are holes and bend which are from pareto chart analysis. Fishbone diagram analysis is used to find the root cause of holes and bend defect. The main cause of holes and bend defect is injection machine setting. Pres and cycle time are the factors which influence production output. Failure Mode and Effect Analysis method is used to analyze the improvement to refuse reject rate. The improvement suggested are materials quality, machine setting, work instruction, and machine control schedule, those improvement can reduce 2% of juventus shelf tray reject rate.
Perancangan Lembar Evaluasi Komunikasi Antar Internal Departemen Demi Tercapainya Umpan Balik Di PT. XYZ Cinthia Gunawan; Jani Rahardjo
Jurnal Titra Vol 3, No 2 (2015)
Publisher : Jurnal Titra

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Abstract

Evaluation communicaton questionnaire has an important role in improving the internal department working performance because it can dig criticisms, suggestions and constructive feedback to each department. PT. XYZ is not currently using any evaluation questionnaire to dig internal department feedback. The purpose of this research is to design communication evaluation questionnaire to  achieve feedback from another department. The technique that used in this study is semi-structured interview to the respondents who selected using judgment sampling method. Analysis techniques and data processing done with the existing coding assistance in Microsoft Excel to generate descriptive data in the form of feedback between departments. Feedback for the department is divided into two types, namely strength and opportunity for improvement point. Strength point is the strength of a department that must be maintained and enhanced, while opportunity for improvement point points should be used as a reflection to improve the department for the better future.
Perancangan dan Implementasi ISO 9001:2008 di PT. Bondi Syad Mulia, Surabaya. Bayu Perdana; Jani Rahardjo
Jurnal Titra Vol 1, No 1 (2013)
Publisher : Jurnal Titra

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Abstract

PT. Bondi Syad Mulia plans to conduct ISO 9001:2008 certification. ISO 9001:2008 is an international standard governing the quality management system in manufacturing and services industry. Company’s management system is expected to become more structured with the application of ISO 9001:2008. A quality management system design is based on the clauses of ISO 9001:2008. The goal of this design is implementing a quality management system and obtaining ISO 9001:2008 certifications. Gap analysis is conducted todetermine whether the requirements of ISO 9001:2008 have been fulfilled or not. The results indicated that only 34.55% requirements in ISO 9001:2008 have been fulfilled in the company. It is indicated that the company needs to redesign a quality management system, which including quality manual and quality procedures of the company. The implementation of the new design is done after all of the new designs have been approved by the top management. After the implementation, an evaluation process is done through audits and management reviews. The results of the final gap analysis indicated that the necessary requirements in ISO 9001:2008 have been fulfilled 100% and the company is ready for the certification process.
Standarisasi berat kalung emas hollow dengan metode PDCA di PT. X Annabela Michaela Prasetyo; Jani Rahardjo
Jurnal Titra Vol 3, No 2 (2015)
Publisher : Jurnal Titra

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Abstract

To control the production quality in terms of product weight, PT. X needs a standardization in production process. The weight standardization will help ease stocking process for both the company and the distributor. This research is used on the hollow product with chain type A with gold levels of 70%. Some of the products weight are not constant due to the variation of shrinkage percentage in every production process. The solution for this problem is to reduce the variation of shrinkage percentage levels in every production process using PDCA method. The improvement results obtained from PDCA method is shown on hammering, hollowing, and bombing process. On hammering process, a decrease in the shrinkage percentage variation is done by controlling the wire’s thick shrinkage percentage 15%-20% for a 5% shrinkage percentage. The percentage of necklace on hollowing process can’t be controlled, as a result an improvement is needed by giving an accurate range percentage standard, 49%-52% for chain A with gold levels of 70%. The weight shrinkage percentage in bombing process is depending on the size of small, medium, and large chain respectively 4%-5%, 5%-6%, 6%-7%.
APLIKASI INTERPRETIVE STRUCTURAL MODELING (ISM) PADA FAKTOR-FAKTOR PENYEBAB KETERLAMBATAN PROYEK KONSTRUKSI DI SURABAYA Eric Cahyadi Halim; Andi Andi; Jani Rahardjo
Dimensi Utama Teknik Sipil Vol 8 No 1 (2021): April 2021
Publisher : Program Studi Magister Teknik Sipil - Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (639.347 KB) | DOI: 10.9744/duts.8.1.60-77

Abstract

Construction projects run the risk of not conforming to the initial expectations of development. It is very difficult to estimate the time of a project because a project is not repetitive, there are different challenges in each development project. Delay in completing a project will cause waste in the form of overtime and overbudget. This research was conducted using judgment sampling to 5 respondents who were expert contractors. The objectives to be achieved through this research are to identify the dominant factors causing delays in a residental project using the Decision Making Trial and Evaluation Laboratory (DEMATEL) method and modeling the relationship between the factors that cause delays in residential construction projects using the Interpretive Structural Modeling (ISM) method. The result of this research is the existence of 8 levels of sub-factor hierarchical structure which becomes the framework for contractors and project owners to reduce the risk of delays in residential construction projects. The dominant causes of delays in project development are design changes during construction, late delivery of materials, late approval of work drawings, late payments, and inappropriate work methods.
Faktor-Faktor Yang Mempengaruhi Keputusan Calon Pembeli Dalam Melakukan Pembelian Apartemen Mewah di Surabaya Williams Dennis Masamitsu; Timoticin Kwanda; Jani Rahardjo
Dimensi Utama Teknik Sipil Vol 6 No 2 (2019): October 2019
Publisher : Program Studi Magister Teknik Sipil - Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9744/duts.6.2.38-48

Abstract

Williams Dennis Masamitsu: Postgraduate Thesis Factors That Influence Prospective Buyer's Decisions to Buy Luxury Apartment in Surabaya This research aims to find out factors that influence prospective buyer’s decision to buy luxury apartment in Surabaya. Data which were collected through online survey from 68 respondent from various city in Indonesia who have the desire to buy luxury apartments in Surabaya. Research gap in this study is that researchers add 2 new variables that have not been studied before. These variables are the another apartments costs and property management. This type of research is quantitative causal. This research used regression models to analyze the effect of price and scheme, another apartment costs, motivation, lifestyle, environment and relation, location, facility, building design and structure, property management, and promotion on prospective buyers to buying decision to luxury apartment in Surabaya. The result showed that simultaneously all the variable have positive and significant influence on consumer buying decision. Partially, the result showed that environment and relation, building design and structure, and property management has the most dominant effect on prospective buying
EFFECT OF FINANCIAL ABILITY OF FIRST-TIME HOME BUYERS ON HOUSE PRICES WITH PARENTAL FINANCIAL ASSISTANCE Alvin Januar Haryono; Njo Anastasia; Jani Rahardjo
Dimensi Utama Teknik Sipil Vol 6 No 2 (2019): October 2019
Publisher : Program Studi Magister Teknik Sipil - Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (446.736 KB) | DOI: 10.9744/duts.6.2.14-25

Abstract

Rumah merupakan salah satu kebutuhan primer. Membeli rumah merupakan salah satu keputusan penting dalam rumah tangga karena nilainya yang besar dan merupakan nilai terbesar dalam portofolio aset keluarga. Namun keterbatasan finansial menjadi salah satu penghambat dalam suatu keluarga untuk membeli rumah. Oleh sebab itu perlunya bantuan finansial orang tua dalam pembelian rumah pertama anaknya. Sehingga penelitian ini bertujuan untuk mengetahui keterlibatan orang tua dalam proses pendanaan pembelian rumah pertama anaknya serta seberapa besar pengaruh bantuan finansial orang tua kepada anaknya dalam membeli rumah pertama kali. Hasil dari penelitian ini menunjukkan bahwa orang tua terlibat dalam pembelian rumah pertama kali untuk anaknya sesuai dengan pendapatannya dan bentuk bantuan yang diberikan. Dari 212 responden, sebagian besar yaitu sebanyak 72,2% orang tua terlibat dalam proses pendanaan rumah pertama anaknya. Rata-rata besar kontribusi bantuan finansial orang tua sebesar 44,4% dari harga rumah. The house is one of the primary needs. Buying a home is one of the important decisions in a household because it has a large value and is the biggest value in a family's asset portfolio. But financial limitations become one of the obstacles in a family to buy a house. Therefore the need for financial assistance from parents for the first time buying a home for their children. So this study aims to determine the involvement of parents in the process of funding their first-time home purchase and how much influence the financial assistance of parents to their children in first-time buying a home. The results of this study indicate that parents are involved in first-time home purchases for their children according to their income and the form of assistance provided. From 212 respondents, the majority of which is as much as 72.2% of parents involved in the first-time home funding process for their children. The average contribution of parents' financial assistance was 44.4% of the price of the house.
Perancangan dan Implementasi Sistem Manajemen Mutu ISO 9001:2015 PADA PT. X Albert Lucano Effendi; Jani Rahardjo
Jurnal Titra Vol 11, No 1 (2023): Jurnal Titra 11(1) Januari 2023
Publisher : Jurnal Titra

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Abstract

PT. X is a heavy duty roller conveyor manufacturer based in Indonesia. The growing market and tense business competition are pushing the company to expand the business locally and internationally in order to survive. To expand the business network, the company must have a quality management system based on ISO 9001:2015. The company wants re-certification with more improved and sustained operation. The previous gap analysis shows that the company still hasn't managed to complete each clause to 100%. Lack of human resources impact on the implementation of ISO 9001:2015.
Perancangan Dokumen Persiapan Sertifikasi ISO 17025:2017 untuk Laboratorium Perkerasan dan Bahan Jalan Sean Rennard Tirtawijaya; Jani Rahardjo
Jurnal Titra Vol 11, No 1 (2023): Jurnal Titra 11(1) Januari 2023
Publisher : Jurnal Titra

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Abstract

The Petra Christian University Pavement and Road Materials Laboratory requires the design of an SNI ISO 17025:2017 document. The design of the document is carried out so that the Pavement and Road Materials laboratory gets accreditation so that the test results can be recognized internationally. This research was conducted by analyzing the initial gap of the document, identifying the business process, creating the document, verifying the document, and analyzing the final gap of the document. The results of the initial gap analysis show that the Pavement and Road Materials Laboratory only has 5 documents with a percentage of 6.76%. Document creation is done by making adjustments to existing documents and designing and creating documents that do not yet exist. After the document creation process is complete, the document is verified, the results of the final document gap analysis show that the completeness of the document has increased by 72.97%. The completeness of the final documents for the Pavement and Road Materials Laboratory is 79.7% with a total of 59 documents.
Usulan Perbaikan Lean Manufacturing untuk Mengevaluasi Waste Produksi Packaging pada PT. Temprina Media Grafika William Nico Widodo; Jani Rahardjo
Jurnal Titra Vol 11, No 1 (2023): Jurnal Titra 11(1) Januari 2023
Publisher : Jurnal Titra

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Abstract

PT. Temprina Media Grafika is a company engaged in manufacturing packaging production. In the production process PT. Temprina still needs to maximize efficiency and minimize waste. The Lean Manufacturing design uses the Value Stream Mapping method to map the existing problem conditions in the production process and evaluate them. VSM development begins with the creation of the current state VSM, then VSM Kaizen Lightening Burst to focus on the parts of the production station that will be repaired, and VSM Future State to map the flow of the production process after applying alternatives and improvements. The results of the initial analysis of the production process have a VA time of 1,738 minutes, NVA of 1.078 minutes, and a total Lead Time of 2.816 minutes. After identification, analysis, and mapping of the VSM Future State, the VA time did not change, namely 1,738 minutes, the overall NVA decreased to 387 minutes, causing the Total Lead Time to decrease to 2.125 minutes, so that the Total Lead Time experienced a faster improvement by 691 minutes or 24.54%.
Co-Authors Adi Cahyadi Dwi Putra Budiman Albert Lucano Effendi Alvin Januar Haryono Andi Andi Annabela Michaela Prasetyo Anthony Gunawan Ardenus Milton Setiadi Bayu Perdana Benedictus Rahardjo Billy Yonathan Sutrisno Cinthia Gunawan Diah Parwati Dewi Bintoro Enrico Alexander Eric Cahyadi Halim Evelyn Fabriane Gunedi Susanto Ian Sanson Imanuel Halim Jonathan Susilo Joseph Santoso Kevin Giovanni Wirahadi Luis Andrew Abraham Njo Anastasia Reza Sudjono Ricky Eriady Rikky Yanuar Robby Hadi Wijaya Ronny Tanto Sean Rennard Tirtawijaya Shandy Ernanto Punyawan Shierly Jayapranata Timothy Calvin Gunawan Timoticin Kwanda Togar W.S Panjaitan Try Fenni Wijayani Vinces Angelica Gunawan William Nico Widodo Williams Dennis Masamitsu Willy Adi Widjaja Yusak Setiawan