Matakuliah
Tahun
Versi
: H0204/ Rekayasa Sistem Komputer
: 2005
: v0 / Revisi 1
Pertemuan 12
Prosedur dan Konsep Perawatan
1
Learning Outcomes
Pada akhir pertemuan ini, diharapkan mahasiswa
akan mampu :
• Merangkaikan pemahaman konsep
kehandalan yang didapat di kelas dengan
sistem yang ada di perusahaan
2
Outline Materi
• Hal-hal yang perlu diperhatikan dalam
menjalankan prosedur perawatan
• Perancangan kemampuan produksi
3
Prosedur dan Konsep Perawatan (preventive dan
Corrective Maintenance)
Pada sistem yang cukup rumit, perlu memperhatikan halhal berikut :
• Unit-unit dalam perbaikan yang akan diganti/ dibuang
• Jadual perawatan pencegahan dan pembagian tugaskelompok
• Unit yang akan diperbaiki, level perbaikan (lokal, pusat
pelayanan, atau pabrik) pada setiap kerusakan
• Pada setiap tugas perbaikan, dibutuhkan level
ketrampilan serta alat uji peralatan dan manual teknik
• Banyaknya jalur perbaikan dan suku cadang (inventory)
4
Perancangan Kemampuan Produksi-(1)
• Ukuran kemudahan dan ekonomis untuk
memproduksi suatu sistem atau produk
• Pertimbangan suatu sistem untuk
diproduksi berdasarkan :
– Penggunaan teknologi tepat guna-tepat
sasaran
– Manfaat langsung dan tidak langsung
– Nilai ekonomis yang diperoleh
• Prosedur perancangan kemampuan
produksi
5
Perancangan Kemampuan Produksi-(2)
System Requirements
Proposed Design Configuration
Selection of components/Materials/Layout
Do the Components and Materials
Satisfy Design Requirements (Stress,
Strength, Corrosion Resistance,
Hardness,Ductility,Electro-,Other)?
No
Yes
Are the Components and Materials
Commercially Available (More
Than One Source or Supply)?
No
Yes
Are the Proposed Manufacturing
Processes Compatible with the
Selected Components/Materials
(Accuracies, Tolarances, Quantities,
Availability)?
No
Yes
Are the Components/Materials
Arranged (Laid Out or Mounted)
to Permit Ease and Economy
in Performing Assembly/Desassembly
Functions?
No
Yes
Is the Proposed Design Configuration
Adequately Represented through
Good Documentation (Approved and
Released Manufacturing Drawings,
Part Lists,etc)?
No
Recommendations
for
Improvement
Yes
Is the Design Configuration
Optimum for Producibility (Can
Anu Improvements be Implemented
Refer to Appendix E)?
No
Yes
System Production/Construction
6
Perancangan Kemampuan
Produksi-(3)
• Nilai ekonomis yang diperoleh
3
2
1
Conceptual Design
Feasibility Study,System
Operational Requirements,
Maintenance
Concept,Advance System/
Product Planning
Identification of Design-toCost (DTC) and Life-Cycle
Cost (LCC) Quantitave
Figures-of-Merit-Targets/
Goals
Preliminary System Design
Detail Design and Development
System Functional Analysis,Allocation of
Requirements,Trade-Off Studies and
Optimization,Synthesis,Design
Review,Prototype Development, System
Test and Evalution
Allocation of Cost Targets/Goals,Life-Cycle
Cost Analysis,Modeling,Cost
Estimation,Development of Profiles,
Identification of High-Cost
Contributors,Sensitivity Analysis,Risk
Analysis,System Modifications for
Improvement
4
Production and/or Construction
System Ulitization and Life-Cycle
Support
Manufacturing,Production,Assem
bly and Test of System
Components and Elements of the
Support Capability
System Operational Use and
Sustaining Life-Cycle
Maintenance and Support
Life-Cycle Cost Analysis,
Modeling, Identification of HighCost Contributors, System
Modifications for Improvement
(Reduction in Life-Cycle Cost)
Life-Cycle Cost Analysis,
Modeling, Identification of High
Cost Contributors,System
Modifications for Improvement
(Reduction in Life-Cycle Cost)
Feedback Loop
7
Latihan soal
Suatu lembar kerja prediksi maintainability diberikan pada
tabel berikut :
Part
Category

Part A
Part B
Part C
Part D
Part E
Part F
Part G
0,143
0,112
0,023
0,093
0,191
0,023
0,312
Maintenance Times (Hours)
N
3
6
4
9
5
8
7
Loc
Iso
Acc
Ali
Che
Int
0.02
0.03
0.01
0.02
0.01
0.03
0.02
0.08
0.02
0.05
0.02
0.04
0.01
0.01
0.12
0.14
0.10
0.16
0.13
0.15
0.13
0.02
0.01
0.01
0.03
0.02
0.03
0.02
0.03
0.01
0.02
0.01
0.03
0.11
0.14
0.07
0.11
0.09
0.12
0.09
(N).().
(Mcti)
…
…
…
…
…
…
…
Cari Maintenance Corrective Time (Mct)
8