Latihan Carta Kawalan
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Transcript of Latihan Carta Kawalan
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LATIHAN LATIHAN CARTA CARTA
KAWALANKAWALAN
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Carta Kawalan p dan npCarta Kawalan p dan np Carta kawalan jenis “Attribute”Carta kawalan jenis “Attribute” Digunakan apabila sampel diklafikasikan Digunakan apabila sampel diklafikasikan
sama ada mengikut atau tidak mengikut sama ada mengikut atau tidak mengikut keperluan operasi yang dijalankankeperluan operasi yang dijalankan
Carta kawalan p – menunjukkan Carta kawalan p – menunjukkan nisbahnisbah item yang “nonconforming”item yang “nonconforming”
Carta kawalan np – menunjukkan Carta kawalan np – menunjukkan bilangan bilangan item yang “nonconforming” item yang “nonconforming”
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Carta Kawalan pCarta Kawalan p Proportion defined as (X/n)Proportion defined as (X/n) Standard deviation for proportion (nisbah)Standard deviation for proportion (nisbah)
Control limit for the proportion of nonconforming Control limit for the proportion of nonconforming item from the sample or subgroup data asitem from the sample or subgroup data as
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Carta Kawalan p – samb…Carta Kawalan p – samb… MakaMaka
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Contoh 1: Nonconforming Hotel Contoh 1: Nonconforming Hotel RoomRoom
Nonconforming hotel rooms at check-in over a 4-Nonconforming hotel rooms at check-in over a 4-week periodweek period
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Penggiraan Contoh 1Penggiraan Contoh 1 For these data,
Thus
So,
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Carta kawalan p : Contoh 1Carta kawalan p : Contoh 1
The p chart for the proportion of nonconforming rooms upon guestarrival.
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Contoh 2 : Carta Kawalan p Contoh 2 : Carta Kawalan p (Bagi saiz kumpulan tidak sama)(Bagi saiz kumpulan tidak sama)
Nonconforming sponges produced daily for a 32-day period.
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Pengiraan Contoh 2Pengiraan Contoh 2
Guna formula yang sama untuk dapatkan LCL dan UCL
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Carta kawalan p: Contoh 2Carta kawalan p: Contoh 2
The p chart for the proportion of nonconforming sponges.
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Carta Kawalan npCarta Kawalan np The standard error of the number the The standard error of the number the
number of “successes” or nonconforming number of “successes” or nonconforming items asitems as
The control limits for the number of nonconforming items as follows:
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Carta kawalan np – samb…Carta kawalan np – samb… Maka,Maka,
Dimana,Dimana,n = subgroup sizek = number of subgroups
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Gunakan Contoh 1Gunakan Contoh 1
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Carta Kawalan np : Contoh 1Carta Kawalan np : Contoh 1
The np chart for the nonconforrning hotel rooms.
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LatihanLatihan
Gunakan Contoh 2 untuk Gunakan Contoh 2 untuk mendapatkan carta kawalan npmendapatkan carta kawalan np
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Menggunakan Microsoft Excel – Menggunakan Microsoft Excel – Carta Kawalan pCarta Kawalan p
Gunakan contoh 1, buat steps berikut:– Open a new workbook and name a sheet
Data. The Data sheet may be set up with days in column
A, Room Studied in column B, Rooms Not Ready in column C, and the proportion for each day entered in column D.
Begin by opening a new workbook and rename the active sheet Data
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Step by stepsStep by steps The steps for creating and entering the data for
the Data sheet are as follows:1. The days are to be entered in rows 2-29 of column
A2. Since the sample size on each day is constant at
200, enter 200 in cell 82 and copy this value down the column to cell B29.
3. Enter the Rooms Not Ready data for each day in the cell range C2:C29.
4. The proportion of rooms not ready each day can be obtained by dividing the entry in column C by the entry in column B. Enter =C2/B2 in cell D2 and then copy this formula down the column to cell D29.
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Cont… : Design Data sheetCont… : Design Data sheet
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Cont… : Design Calculation sheetCont… : Design Calculation sheet
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Calculation sheetCalculation sheet
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Design Chart – using chart wizardDesign Chart – using chart wizard