Manajemen Produksi - 2
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Transcript of Manajemen Produksi - 2
Dr. Ellysa Nursanti, ST. MT.
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ASQ – “Kualitas adalah suatu terminologi yang bersifat
subjektif, masing-masing orang memiliki definisinya sendiri”
Deming (Out of the Crisis) - “non-faulty systems”
Juran (Quality Control Handbook)- “fitness for use”
Crosby (Quality is Free)- “conformance to requirements”
What is Quality?
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DUA PERSPEKTIF KUALITAS
Sumber: Russel, 1996
Gambar 1.1 Dua Perspektif Kualitas
Arti Kualitas
Pandangan Produsen Pandangan Konsumen
Kualitas kesesuaian
Sesuai standar
Sesuai biaya
Kualitas Desain
Karakteristik
kualitas
Harga
Fitness for
consumer use
Produksi Pemasaran
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Customers
Government
Manufacturer
Persepsi Kualitas
the quality of the design (look, feel, function)
• conformance to requirements (Crosby)
• costs of quality (prevention, scrap, warranty)
• increasing conformance raises profits
• products should be safe
• not harmful to environment
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Stout’s View
Quality = Performance
Expectation
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Manufacturing dimensions Service dimensions
Performance Features Reliability Conformance Durability Serviceability Aesthetics Perceived quality
Reliability Responsiveness Assurance Empathy Tangibles
Value-based Approach
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Persaingan global yang semakin ketat
Tingginya tuntutan konsumen
Transparansi keterbukaan
Kemajuan Teknologi
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Tantangan
Mengurangi frekuensi pengerjaan ulang (rework), kesalahan, penundaan
Menggunakan waktu dan material dengan lebih baik
Dapat mengurangi biaya produksi 15 - 20%.
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Manfaat Kontrol Kualitas
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Hirarkhi Kualitas
Inspection
Quality Control
Quality Assurance
Total Quality
Management
Pelaksanaan kegiatan QA/QC
dalam sistem manajemen
perusahaan bertujuan untuk
memenuhi tuntutan pelanggan
Tindakan untuk meyakinkan
bahwa produk atau jasa
yang diberikan sesuai
dengan persyaratan
Teknik-teknik Operasional agar
pemeriksaan lebih efisien dan
mengurangi biaya kualitas.
Pencegahan
Pemeriksaan
SPC
SQC
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Nilai kualitas
Nilai kualitas adalah indeks penilaian pelanggan, yang merupakan harga yang dibayarkan pelanggan atas hasil atau manfaat yang dirasakan karena kualitas produk atau proses sesuai dengan harapannya (Bester, 1999).
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BIAYA KUALITAS
Cost of achieving
good quality
Cost of poor quality
Prevention costs
Appraisal costs
Internal failure costs
External failure costs
Qu
ality p
lann
ing
co
sts
Pro
du
ction
desig
n
costs
Pro
cess costs
trainin
g co
sts
Info
rmatio
n co
sts
Insp
ection
&
testing
costs
equ
ipm
ent T
est costs
Op
erator co
sts
Scrap
costs
Rew
ork
costs
Pro
cess failure co
sts
Pro
du
ct liability
co
sts
Warran
ty claim
s co
sts
Pro
du
ct return
co
sts Cu
stom
er co
mp
laint co
sts
Pro
cess do
ntim
e co
sts
Price-d
ow
ng
radin
g
costs
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Bagaimana hubungan Kualitas dengan Biaya?
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Perlunya
Quality by Objective (QBO)
Kualitas, Produktivitas dan Efisiensi
Omachnu dan Beruvides (1998)
Produktivitas =
dimana:
input = sumber daya yang digunakan
output = hasil yang dicapai
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Sementara itu, efisiensi dirumuskan sebagai:
Efisiensi = __standar jam kerja yang menghasilkan x 100%
jam kerja yang sesungguhnya digunakan
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Increased productivity
Quality
Conformance to
requirements
Meets customer
expectation
Exceeds customer
expectations
Superiority to
competitors
Reduced rework/repair
Reduced costs
Avoids customer
dissatisfaction
Reduced returns,
complaints, warranty
Customer satisfaction
Reputation
Increased market
Premium prices
Increased profit
Theoretical framework relating quality and performance
Lost Opportunity
Scrap
Rework
Inspection
Warranty Rejects
Lost sales
Late delivery
Engineering change orders
Long cycle times
Expediting costs
Excess inventory
The Cost of Poor Quality (COPQ) “Iceberg”
Traditional Quality Costs
Additional Costs of Poor Quality
(intangible)
(tangible)
4-8%
25-35%
(Easily Identified)
(Difficult or impossible to measure)
Lost Customer Loyalty More Setups
FOUR MAIN GROUPS
1. Management Responsibility.
2. Resource Management.
3. Management of Process.
4. Measurement, Analysis and Improvement.
Quality Planning Quality Control Quality Improvement
• menentukan konsumen
• menentukan kebutuhan konsumen
• mengembangkan produk = f (kebutuhan)
• mengembangkan proses = f ( produk)
• evaluasi produk
• membandingkan dengan tujuan
• perbaikan
• infrastruktur
• melihat kemajuan yang dicapai
• motivasi tim
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Trilogi Kualitas – M Juran
Genichi Taguchi Shigeo Singo
Memasukkan faktor engineering untuk menurunkan gangguan proses sehingga dapat meningkatkan keuntungan
Konsep Zero Defect
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Genichi Taguchi & Shigeo Singo
• check sheet,
• histogram,
• cause - effect diagram,
• scattered diagram,
• stratification,
• Pareto diagram,
• control chart
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KAORU ISHIKAWA
Referensi
Giltlow, Openheim, 1995, Quality Management Tools and Methods for Improvement, Richard D. Irwin Inc.
Grant, E.L. and R.S. Leaventworth, 1972, Statistical Quality Control, John Wiley & Sons.
Montgomery, D.C., 1985, Introduction to Statistical Quality Control, Mc Graw Hill.
Roberts, H. V. , and King, B. F., 2004, STATISTICAL TECHNIQUES FOR MANAGERS, Draft textbook prepared for use in QMB 6603, Data Analysis for Managers, a course in the MBA Program, College of Business, Florida Atlantic University.
Statsoft Inc., 1986, Quality Qontrol Charts, General Purpose
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