Control Chart
(Peta Kendali)
Transparency Masters to accompany
Heizer/Render – Principles of Operations
Management, 5e, and Operations
Management, 7e
Types of
Statistical Quality Control
Statistical
Quality Control
Acceptance
Sampling
Process
Control
Variables
Charts
Transparency Masters to
accompany Heizer/Render –
Attributes
Charts
Types of
Statistical Quality Control
Konsep
–Pengendalian Mutu PROSES
–Perfomance of characteristis quality chart
Transparency Masters to
accompany Heizer/Render –
Manfaat Umum
–Peningkatan kepuasan pelanggan
–Pengurangan pemborosan
–Perbaikan pengendalian dalam proses
–Peningkatan efisiensi
–Peningkatan jaminan kualitas pelanggan
–Perbaikan analisis dan monitoring proses
–Peningkatan pemahaman thdp proses
–Pengurangan keluhan pelanggan
Transparency Masters to accompany
Heizer/Render – Principles of Operations
Management, 5e, and Operations
Management, 7e
Manfaat pada proses
–Proses memiliki stabilitas ttg perilaku jgk pendek
–Proses punya identitas untuk prediksi kondisi y.a.d
–Proses berada dlm kondisi ”batas kendali”
dg
variabilitas dan error yg lbh rendah
–Proses dlm bts kendali memenuhi spesifikasi produk
–Proses yg tdk stabil bs diperbaiki
Transparency Masters to accompany
Heizer/Render – Principles of Operations
Management, 5e, and Operations
Management, 7e
Perusahaan tdk mau...?
–Kurang menyadari manfaat SPC
–Kurangnya sumberdaya dan anggaran
–Hambatan waktu
–Budaya organisasi yg tdk siap
menggunakan SPC
–Bukan prioritas bisnis komersial prshn
–Keputusan manajemen (tanpa SPC jg bisa
sukses)
Transparency Masters to accompany
Heizer/Render – Principles of Operations
Management, 5e, and Operations
Management, 7e
Statistical Process Control Steps
Start
Produce Good
Provide Service
Take Sample
Inspect Sample
Create
Control Chart
Transparency Masters to
accompany Heizer/Render –
No
Can we assign
causes?
Yes
Stop Process
Find Out Why
Control Chart Types
Continuous
Numerical Data
Categorical or Discrete
Numerical Data
Control
Charts
Variables
Charts
R
Chart
Transparency Masters to
accompany Heizer/Render –
Attributes
Charts
X
Chart
P
Chart
C
Chart
Control Charts Classification..
• Variables - concentrates on mean for
some measurable characteristic
(pengukuran)
– diameter
– length
• Attribute - data is based on counts or the
number of times we observe a particular
event (perhitungan)
– proportion defective/non-defective
– go/no go
Transparency Masters to
accompany Heizer/Render –
TYPE CONTROL CHART
Tipe
Subyek
Example
Peta p
Data dihitung
(dlm proporsi)
•Jumlah kerusakan
•Jenis kerusakan
Peta c
Data dihitung
•Jumlah cacat lubang (p,v) dr
ukuran t3, tetap
Peta X-R
Data diukur
Panjang,lebar,berat,volume
Transparency Masters to accompany
Heizer/Render – Principles of Operations
Management, 5e, and Operations
Management, 7e
Tahapan Analisis Peta Kendali
• Memilih karakteristik yg akan
direncanakan (prioritas tinggi pd proses
yg sgt mempengaruhi kualitas produk
akhir)
• Memilih tipe peta kendali
• Menentukan garis pusat (Center Line)
dan batas kendali atas dan bawah (UCL
dan LCL)
• Penempatan data dan interpretasi hasil
Transparency Masters to
accompany Heizer/Render –
Process Control Charts
Plot of Sample Data Over Time
Sample Value
80
Sample
Value
UCL
60
40
Average
20
LCL
0
1
5
9
13
Time
Transparency Masters to
accompany Heizer/Render –
17
21
Pola Peta Kendali
Transparency Masters to
accompany Heizer/Render –
Terima Kasih
Transparency Masters to accompany
Heizer/Render – Principles of Operations
Management, 5e, and Operations
Management, 7e