Strategi Manajemen Pemeliharaan untuk Mengoptimalkan Kontribusi Pada Kinerja Perusahaan (Studi Kasus pada PT Indonesia Power UP.Semarang)

2019 ◽  
Vol 28 (2) ◽  
pp. 110-122
Author(s):  
Dandy Alfian Sabila ◽  
Mahfudz Mahfudz
Keyword(s):  
Life Time ◽  
Time Machine ◽  
Fishbone Diagram

Tujuan penelitian ini adalah untuk tujuan dalam penelitian ini adalah untuk  mengevaluasi kinerja pemeliharaan dalam memberikan kontribusi menjaga kesiapan, kehandalan, dan effisiensi unit Pembangkit Listrik. Narasumber dalam studi ini adalah Manajer Pemeliharaan, Supervisor Senior Perencanaan, Pengendalian dan Evaluasi Pemelihraan, Kepala Divisi. Data dikumpulkan dengan metode kualitatif wawancara mendalam dan observasi. Data dianalisis menggunakan Fishbone Diagram. Berdasarkan analisa yang dilakakuan ditemukan bahwa faktor penyebab utama gangguan operasi pembangkit dibagi menjadi dua, penyebab yang pertama diluar kendali management UP Semarang seperti life time machine, pola operasi start-stop, anggaran pemeliharaan yang terbatas. Faktor yang kedua sebenarnya masih dapat dikendalikan management UP Semarang dari aspek people dan methode. kontribusi manajemen pemeliharaan terhadap kinerja perusahaan belum optimal untuk mencapai perbaikan substansial, kelemahannya ada pada tata kelola WPC karena kurang konsisten dalam pelaksanaannya, sedangkan upaya yang telah dilakukan belum maksimal untuk mencapai optimalisasi terhadap kinerja perusahaan karena setiap elemen proses masih kurang sinergi. Berdasarkan hasil kesimpulan, dapat dilakukan impikasi kebijakan dengan meningkatkan metode pemeliharaan dan membenahi kualitas SDM serta leadership.

scholarly journals Analisis Penerapan Total Productive Maintenance (TPM) Menggunakan Overall Equipment Efectiveness (OEE) Dan Six Big Losses Pada Mesin Cold Leveller PT. KPS

2019 ◽  
Vol 2 (1) ◽  
pp. 94
Author(s):  
Muhamad Bob Anthony
Keyword(s):  
Dominant Factor ◽  
Equipment Failure ◽  
Time Machine ◽  
Steel Company ◽  
Total Productive Maintenance ◽  
Quality Maintenance ◽  
Root Cause ◽  
Foreign Countries ◽  
Fishbone Diagram ◽  
Failure Losses

PT. KPS is one steel company in Indonesia that produces steel products in the form of slab and plate that is marketed in the country up to foreign countries. Cold leveller machine is a machine that serves to flatten the surface of the plate. Problems occurred in the machinery that is often experienced a breakdown so that the plate with uneven surfaces more and more because of the time machine working on the wane. This research aims to quantify the value of the overall equipment effectiveness (OEE), calculating the factor of six big losses and figure out the root cause of the problem, the dominant factor of the six big losses with the fishbone diagram. The OEE value obtained on the engine cold leveller is 82%. The biggest factor that causes the low effectiveness of the machine that is the reduced speed losses amounting to 11.59% and equipment failure losses amounted to 6.04%. The proposed corrective actions is prioritizing the main TPM pillar 3 that is autonomous maintenance, quality maintenance, training and education.Keyword : fishbone diagram, overall equipment effectiveness (OEE), pareto, the six big losses, total productive maintenance (TPM)PT. KPS adalah salah satu perusahaan baja di Indonesia yang memproduksi produk baja berupa slab dan plate yang dipasarkan di dalam negeri hingga ke luar negeri. Mesin cold leveller merupakan mesin yang berfungsi meratakan permukaan plate yang tidak rata. Permasalahan yang terjadi pada mesin tersebut yaitu sering mengalami breakdown sehingga plate dengan permukaan yang tidak rata semakin banyak karena waktu bekerja mesin semakin berkurang. Penelitian ini bertujuan untuk menghitung nilai overall equipment effectiveness (OEE), menghitung nilai faktor six big losses dan mengetahui akar penyebab masalah yang dominan dari faktor six big losses dengan fishbone diagram. Nilai OEE yang didapat pada mesin cold leveller adalah sebesar 82%. Faktor terbesar yang menyebabkan rendahnya efektifitas mesin yaitu reduced speed losses sebesar 11,59% dan equipment failure losses sebesar 6,04%. Tindakan perbaikan yang diusulkan adalah memprioritaskan 3 pilar utama TPM yaitu autonomous maintenance, quality maintenance, training dan education.Kata Kunci: fishbone diagram, overall equipment effectiveness (OEE), pareto, six big losses , total productive maintenance (TPM)

SEM and Auger microanalysis studies of Cu-Be dynode surfaces at each activation condition

1978 ◽  
Vol 36 (1) ◽  
pp. 524-525
Author(s):  
T. Koshikawa ◽  
Y. Fujii ◽  
E. Sugata ◽  
F. Kanematsu
Keyword(s):  
Electron Emission ◽  
Secondary Electron ◽  
Secondary Electron Emission ◽  
Life Time ◽  
Activation Process ◽  
Beam Diameter ◽  
Activation Temperature ◽  
Electron Multiplier ◽  
Activation Condition ◽  
Activation Conditions

The Cu-Be alloys are widely used as the electron multiplier dynodes after the adequate activation process. But the structures and compositions of the elements on the activated surfaces were not studied clearly. The Cu-Be alloys are heated in the oxygen atmosphere in the usual activation techniques. The activation conditions, e.g. temperature and O2 pressure, affect strongly the secondary electron yield and life time of dynodes.In the present paper, the activated Cu-Be dynode surfaces at each condition are investigated with Scanning Auger Microanalyzer (SAM) (primary beam diameter: 3μmϕ) and SEM. The commercial Cu-Be(2%) alloys were polished with Cr2O3 powder, rinsed in the distilled water and set in the vacuum furnance.Two typical activation condition, i.e. activation temperature 730°C and 810°C in 5x10-3 Torr O2 pressure were chosen since the formation mechanism of the BeO film on the Cu-Be alloys was guessed to be very different at each temperature from the results of the secondary electron emission measurements.

Negative Life Events Associated With Deliberate Self-Harm in an African Population in Uganda

Crisis ◽  
2005 ◽  
Vol 26 (1) ◽  
pp. 4-11 ◽  
Author(s):  
E. Kinyanda ◽  
H. Hjelmeland ◽  
S. Musisi
Keyword(s):  
Life Events ◽  
Negative Life Events ◽  
Life Time ◽  
Later Life ◽  
Dose Effect ◽  
Deliberate Self Harm ◽  
Time Period ◽  
Significant Difference ◽  
Self Harm ◽  
Suicide Interventions

Abstract. Negative life events associated with deliberate self-harm (DSH) were investigated in an African context in Uganda. Patients admitted at three general hospitals in Kampala, Uganda were interviewed using a Luganda version (predominant language in the study area) of the European Parasuicide Study Interview Schedule I. The results of the life events and histories module are reported in this paper. The categories of negative life events in childhood that were significantly associated with DSH included those related to parents, significant others, personal events, and the total negative life events load in childhood. For the later-life time period, the negative life events load in the partner category and the total negative life events in this time period were associated with DSH. In the last-year time period, the negative life events load related to personal events and the total number of negative life events in this time period were associated with DSH. A statistically significant difference between the cases and controls for the total number of negative life events reported over the entire lifetime of the respondents was also observed, which suggests a dose effect of negative life events on DSH. Gender differences were also observed among the cases. In conclusion, life events appear to be an important factor in DSH in this cultural environment. The implication of these results for treatment and the future development of suicide interventions in this country are discussed.

Inactivation of Factor XIa in Vivo: Studies in Chimpanzees and in Humans

1996 ◽  
Vol 76 (04) ◽  
pp. 549-555 ◽  
Author(s):  
Walter A Wuillemin ◽  
C Erik Hack ◽  
Wim K Bleeker ◽  
Bart J Biemond ◽  
Marcel Levi ◽  
...  
Keyword(s):  
Antithrombin Iii ◽  
Life Time ◽  
In Vivo Studies ◽  
Clinical Samples ◽  
Plasma Samples ◽  
C1 Inhibitor ◽  
Elimination Kinetics ◽  
Factor Xia ◽  
Best Parameter

SummaryC1-inhibitor (C1Inh), antithrombin III (ATIII), α1-antitrypsin (a1AT), and α2-antiplasmin (a2AP) are known inhibitors of factor XIa (FXIa). However, their precise contribution to FXIa inactivation in vivo is not known. We investigated FXIa inactivation in chimpanzees and assessed the contribution of these inhibitors to FXIa inactivation in patients with presumed FXI activation.Chimpanzees were infused with FXIa and the various FXIa-FXIa inhibitor complexes formed were measured. Most of FXIa was complexed to C1Inh (68%), followed by a2AP (13%), a1AT (10%), and ATIII (9%). Analysis of the plasma elimination kinetics revealed a half-life time of clearance (t1/2) for the FXIa-FXIa inhibitor complexes of 95 to 104 min, except for FXIa-a1AT, which had a t1/2 of 349 min. Due to this long t1/2, FXIa-a1AT complexes were predicted to show the highest levels in plasma samples from patients with activation of FXI. This was indeed shown in patients with disseminated intravascular coagulation, recent myocardial infarction or unstable angina pectoris. We conclude from this study that in vivo C1Inh is the predominant inhibitor of FXIa, but that FXIa-a1 AT complexes due to their relatively long t1/2 may be the best parameter to assess FXI activation in clinical samples.

Covalent Complexes Between Low Molecular Weight Heparin Fragments and Antithrombin III – Inhibition Kinetics and Turnover Parameters

1983 ◽  
Vol 49 (02) ◽  
pp. 109-115 ◽  
Author(s):  
M Hoylaerts ◽  
E Holmer ◽  
M de Mol ◽  
D Collen
Keyword(s):  
Molecular Weight ◽  
Half Life ◽  
Low Molecular Weight Heparin ◽  
Antithrombin Iii ◽  
Factor Xa ◽  
Life Time ◽  
Low Molecular Weight ◽  
High Affinity ◽  
Plasma Half Life ◽  
Covalent Complex

SummaryTwo high affinity heparin fragments (A/r 4,300 and M, 3,200) were covalently coupled to antithrombin III (J. Biol. Chem. 1982; 257: 3401-3408) with an apparent 1:1 stoichiometry and a 30-35% yield.The purified covalent complexes inhibited factor Xa with second order rate constants very similar to those obtained for antithrombin III saturated with these heparin fragments and to that obtained for the covalent complex between antithrombin III and native high affinity heparin.The disappearance rates from plasma in rabbits of both low molecular weight heparin fragments and their complexes could adequately be represented by two-compartment mammillary models. The plasma half-life (t'/j) of both low Afr-heparin fragments was approximately 2.4 hr. Covalent coupling of the fragments to antithrombin III increased this half-life about 3.5 fold (t1/2 ≃ 7.7 hr), approaching that of free antithrombin III (t1/2 ≃ 11 ± 0.4 hr) and resulting in a 30fold longer life time of factor Xa inhibitory activity in plasma as compared to that of free intact heparin (t1/2 ≃ 0.25 ± 0.04 hr).

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