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JENIS MATERIAL PAHAT POTONG DAN RUN OUT TERHADAP KEKASARAN PERMUKAAN BENDA KERJA SILINDER PADA PROSES BUBUT Hendra, Hendra; Sutarmadi, Sutarmadi; Indriani, Anizar; Hernadewita, Hernadewita
Jurnal MEKANIKAL Vol 4, No 2 (2013): JM Vol. 4 No. 2, Juli 2013
Publisher : Jurnal MEKANIKAL

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Machining process is part of the production process where cutting process of work piece is done by using machine tools. Machine tools are used in the machining process includes lathe machines, milling machines, shaping machines, drilling machines and other machine tools. For a cylindrical work piece the cutting process can be done by using a lathe. Lathe process can make cylindrical objects, holes, taper and other forms. In the cutting process of work piece with a lathe machine are required high accuracy and precision especially for work piece such as shafts , pistons and objects that serve as a connecting other components. Work piece with high accuracy and precision can be obtained by use the reliable of machine tools, cutting condition, the selection of machining elements and material of cutting tools; operators have a skill for operation of machine tools. Cutting conditions such as mounting work pieces that are not center (run out) or overhang of work piece with strong pressure between head stock and tail stock can be resulting deflection. Run out and deflection happened can be cause the cutting force is not uniform. Therefore cause damage to the work piece and machine. Damage on the work piece can be seen from the quality of the cutting (surface roughness) and for machine on the case of chatter or vibration arising from the cutting force. In this paper we will focus to determine the effect of cutting tools material and run out of material on the surface roughness where as machining element used is the depth of cut and feeding. Work piece used is made of medium carbon steel.
JENIS MATERIAL PAHAT POTONG DAN RUN OUT TERHADAP KEKASARAN PERMUKAAN BENDA KERJA SILINDER PADA PROSES BUBUT Hendra, Hendra; Sutarmadi, Sutarmadi; Indriani, Anizar; Hernadewita, Hernadewita
Jurnal MEKANIKAL Vol 4, No 2 (2013): JM Vol. 4 No. 2, Juli 2013
Publisher : Jurnal MEKANIKAL

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Machining process is part of the production process where cutting process of work piece is done by using machine tools. Machine tools are used in the machining process includes lathe machines, milling machines, shaping machines, drilling machines and other machine tools. For a cylindrical work piece the cutting process can be done by using a lathe. Lathe process can make cylindrical objects, holes, taper and other forms. In the cutting process of work piece with a lathe machine are required high accuracy and precision especially for work piece such as shafts , pistons and objects that serve as a connecting other components. Work piece with high accuracy and precision can be obtained by use the reliable of machine tools, cutting condition, the selection of machining elements and material of cutting tools; operators have a skill for operation of machine tools. Cutting conditions such as mounting work pieces that are not center (run out) or overhang of work piece with strong pressure between head stock and tail stock can be resulting deflection. Run out and deflection happened can be cause the cutting force is not uniform. Therefore cause damage to the work piece and machine. Damage on the work piece can be seen from the quality of the cutting (surface roughness) and for machine on the case of chatter or vibration arising from the cutting force. In this paper we will focus to determine the effect of cutting tools material and run out of material on the surface roughness where as machining element used is the depth of cut and feeding. Work piece used is made of medium carbon steel.
Pengaruh Kualitas Pelayanan dan Kualitas Pembelajaran Terhadap Kepuasan Mahasiswa Dengan Metode SEM-PLS Debora, Fransisca; Hernadewita, Hernadewita
Operations Excellence: Journal of Applied Industrial Engineering Vol 11, No 1, Maret 2019: Operations Excellence
Publisher : Magister Teknik Industri, Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/oe.v.10.3.2018.015

Abstract

The development of science and technology and the factors of the ASEAN economic community (MEA) which are supported by increasing industry 4.0, the government gives important responsibilities for universities to be able to produce human resources that can compete in that era. This affects universities to continue to improve in terms of the quality of learning, service quality, to provide satisfaction to students which has an influence on the productivity of higher education. In this regard, research was conducted on 120 samples of student respondents (active students, and alumni) who were used to provide information by distributing questionnaires processed by Structural Equation Modeling (SEM) - Partial Least Square (PLS). Based on the results of the analysis and discussion it can be concluded that service quality has a positive effect on student satisfaction and positively influences the productivity of higher education.
PENGARUH PENERAPAN ISO 9001:2008 TERHADAP PENINGKATAN KINERJA KERJA KARYAWAN PT. SOFTEX INDONESIA Sabilah, Ade Irpan; Hernadewita, Hernadewita; Wibowo, Sadiq Ardo; Damanik, Yan Mahesa; Susanti, Elva
JURNAL REKAYASA SISTEM INDUSTRI Vol 4 No 2 (2019): Edition May
Publisher : Universitas Putera Batam

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (667.373 KB) | DOI: 10.33884/jrsi.v1i2.1245

Abstract

Quality management system is the ability of an organization to maintain the quality of goods or services that are served. The efforts made by the company are to improve the management system that is prime with ISO 9001: 2008 which is an international requirement for a company's management system. PT Softex Indonesia is the first producer of sanitary napkin made in Indonesia which has obtained ISO 9001: 2008 certificate and applied it in the implementation of production activities. One way to achieve success in maintaining the quality of a product is by improving work performance in order to produce quality products. Based on this, the researchers analyzed the effect of implementing ISO 9001: 2008 on improving employee performance. The data used in this study were obtained from a questionnaire (primary) and several observations and direct interviews with parties related to employee performance. The analysis technique used is simple regression using hypothesis testing, namely F test and t test. Based on the results of the study the magnitude of the influence of the application of ISO 9001: 2008 which directly affects the improvement of employee performance. From this study, R Square value was 0.504, which means that 50.4% of employee performance improvement variables can be explained by its independent variables, namely ISO 9001: 2008, while the remaining 49.3% is explained by other variables outside of this study
Productivity improvement in the rubber production process using value stream mapping method to eliminate waste Haviana, Evan; Hernadewita, Hernadewita
Operations Excellence: Journal of Applied Industrial Engineering Vol 11, No 2, Juli 2019: Operations Excellence
Publisher : Magister Teknik Industri, Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/oe.v11.2.2019.023

Abstract

This Journal is the research of object that engaged in Industry of rubber Company, the product are formed in the Gasket product for final assembly into Hard Disk Drive, the function is to protect the connector inside Hard Disc. The Company continue to develop products and improve productivity performance by trying to improve quality of service, production process, and delivery product to customer with minimal cost and on time. To reach that purpose, a good method to eliminate waste and identify activities that can affect the products value-added was found, its value stream mapping (VSM), who can help to identify the waste from information flow, material flow and or processes flow. For this researchVSM with the support by root cause analysis tool has able to identify the highest stoppages processes contributed at rubber production that can increase the productivity. Rubber material, curing and deflashing processes had been selected for the improvement project. The improvement result showed total change over time (Non value added) from those processes were seen to be reduced from 70% until 88,89%.      
Productivity improvement in the rubber production process using value stream mapping method to eliminate waste Haviana, Evan; Hernadewita, Hernadewita
Operations Excellence: Journal of Applied Industrial Engineering Vol 11, No 2, Juli 2019: Operations Excellence
Publisher : Magister Teknik Industri, Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/oe.v11.2.2019.023

Abstract

This Journal is the research of object that engaged in Industry of rubber Company, the product are formed in the Gasket product for final assembly into Hard Disk Drive, the function is to protect the connector inside Hard Disc. The Company continue to develop products and improve productivity performance by trying to improve quality of service, production process, and delivery product to customer with minimal cost and on time. To reach that purpose, a good method to eliminate waste and identify activities that can affect the products value-added was found, its value stream mapping (VSM), who can help to identify the waste from information flow, material flow and or processes flow. For this researchVSM with the support by root cause analysis tool has able to identify the highest stoppages processes contributed at rubber production that can increase the productivity. Rubber material, curing and deflashing processes had been selected for the improvement project. The improvement result showed total change over time (Non value added) from those processes were seen to be reduced from 70% until 88,89%.      
Pengaruh Kualitas Pelayanan dan Kualitas Pembelajaran Terhadap Kepuasan Mahasiswa Dengan Metode SEM-PLS Debora, Fransisca; Hernadewita, Hernadewita
Operations Excellence: Journal of Applied Industrial Engineering Vol 11, No 1, Maret 2019: Operations Excellence
Publisher : Magister Teknik Industri, Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/oe.v.10.3.2018.015

Abstract

The development of science and technology and the factors of the ASEAN economic community (MEA) which are supported by increasing industry 4.0, the government gives important responsibilities for universities to be able to produce human resources that can compete in that era. This affects universities to continue to improve in terms of the quality of learning, service quality, to provide satisfaction to students which has an influence on the productivity of higher education. In this regard, research was conducted on 120 samples of student respondents (active students, and alumni) who were used to provide information by distributing questionnaires processed by Structural Equation Modeling (SEM) - Partial Least Square (PLS). Based on the results of the analysis and discussion it can be concluded that service quality has a positive effect on student satisfaction and positively influences the productivity of higher education.