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0
80
Untuk melakukan perhitungan loss function, maka digunakan rumus :
k
=
L
0
?²
Dimana :
k
=
koeffisien biaya
L
0
=
rata-rata biaya
?
2
=
toleransi
Khusus untuk Larger the Better :
k
=
L
x?²
Tabel 2.4 Tabel Rumus Loss Function Berdasarkan Karakteristik Kualitas
Karakteristik Kualitas
Jenis Produk
One-Piece
Many-Pieces
Smaller the Better
L
=
k
(y - t
)
2
L
=
k
[S
+
(y - t
)
2
]
Nominal is Best
L
=
ky
2
L
=
k
(S
+
y
2
)
Larger The Better
2
?
?
L
=
k
?
1
?
?
y
?
?
3S²
?
L
=
?
1
+
?
µ
?
µ
2  
?
Sumber : Mitra, 1993
Dimana :
y
= rata-rata hasil percobaan
t
= nilai target
S
= standar deviasi
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