Manajemen Perawatan – 02 Analisa KegagalanArif Rahman – Universitas Brawijaya 1 1 ANALISA KEGAGALAN S2 TMI – UB 2010/2011

Manajemen Perawatan – 02 Analisa KegagalanArif Rahman – Universitas Brawijaya Metode Pengukuran Resiko Fault Tree Analysis Failure Mode and Effect Analysis 2

Manajemen Perawatan – 02 Analisa KegagalanArif Rahman – Universitas Brawijaya Definition Probabilitas: peluang atau kemungkinan kemunculan satu kejadian. Resiko: peluang kemunculan satu kejadian yang tidak diharapkan serta tingkat kritis dampak yang diakibatkan. Pengukuran Resiko: proses kategorisasi resiko secara kualitatif atau estimasi resiko kuantitatif. Manajemen Resiko : proses identifikasi resiko, pengukuran resiko, disposisi resiko serta monitor dan kontrol resiko. 3

Manajemen Perawatan – 02 Analisa KegagalanArif Rahman – Universitas Brawijaya Definition Reliability: The probability that an item will perform its intended function for a specified mission profile. Safety: The freedom of injury, damage, or loss of resources. Hazard: The condition that can result in or contribute to a mishap. Mishap: An unintended event that can cause injuries, damage, or loss of resources. 4

Manajemen Perawatan – 02 Analisa KegagalanArif Rahman – Universitas Brawijaya Fault Tree Analysis Failure or Fault Tree Analysis (FTA) merupakan pendekatan deduktif top- down yang merepresentasi hubungan antar kejadian secara grafis dan logik di mana status kejadian di level yang lebih rendah mempengaruhi status kejadian di level yang lebih tinggi FTA menjadi alat sistematis untuk mendeskripsikan bagaimana interaksi antar elemen sistem yang mempengaruhi terjadinya kegagalan sistem. 5

Manajemen Perawatan – 02 Analisa KegagalanArif Rahman – Universitas Brawijaya Event Symbol 6

Manajemen Perawatan – 02 Analisa KegagalanArif Rahman – Universitas Brawijaya Gate Symbols 7

Manajemen Perawatan – 02 Analisa KegagalanArif Rahman – Universitas Brawijaya FTA Steps 8

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Manajemen Perawatan – 02 Analisa KegagalanArif Rahman – Universitas Brawijaya 11

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Manajemen Perawatan – 02 Analisa KegagalanArif Rahman – Universitas Brawijaya Failure Mode & Effect Analysis Failure Mode & Effect Analysis (FMEA) merupakan metode analisis manual untuk menentukan konsekuen dari kegagalan komponen, modul atau subsistem FMEA berwujud tabel spreadsheet yang mengidentifikasi macam kegagalan ( failure mode ), akibat kegagalan ( failure effect ), penyebab ( possible causes ), frekuensi kejadian ( probability of occurrence ), dampak kegagalan ( severity ) konsekuenconsequences, and proposed safeguards are noted. 15

Manajemen Perawatan – 02 Analisa KegagalanArif Rahman – Universitas Brawijaya FMEA Steps 1.For each process input (start with high value inputs), determine the ways in which the input can go wrong (failure mode) 2.For each failure mode, determine effects. Select a severity level for each effect 3.Identify potential causes of each failure mode. Select an occurrence level for each cause 4.List current controls for each cause. Select a detection level for each cause 16

Manajemen Perawatan – 02 Analisa KegagalanArif Rahman – Universitas Brawijaya FMEA Steps 5. Calculate the Risk Priority Number (RPN) 6.Develop recommended actions, assign responsible persons, and take actions. Give priority to high RPNs. 7.Assign the predicted severity, occurrence, and detection levels and compare RPNs 17

Manajemen Perawatan – 02 Analisa KegagalanArif Rahman – Universitas Brawijaya Failure Modes and Effects The relationship between failure modes and effects is not always 1 to 1 18 Failure Mode 1 Failure Mode 2 Effect 1 Effect 2 Failure Mode 1 Failure Mode 2 Effect 1 Failure Mode 1 Effect 1 Effect 2

Manajemen Perawatan – 02 Analisa KegagalanArif Rahman – Universitas Brawijaya Severity, Occurrence, and Detection Severity Importance of the effect on customer requirements Often can’t do anything about this Occurrence Frequency with which a given cause occurs and creates failure modes Detection The ability of the current control scheme to detect or prevent a given cause 19

Manajemen Perawatan – 02 Analisa KegagalanArif Rahman – Universitas Brawijaya Severity, Occurrence, and Detection Severity 1 = Not Severe, 10 = Very Severe Occurrence 1 = Not Likely, 10 = Very Likely Detection 1 = Likely to Detect, 10 = Not Likely to Detect 20

Manajemen Perawatan – 02 Analisa KegagalanArif Rahman – Universitas Brawijaya Risk Priority Number (RPN) RPN is the product of the severity, occurrence, and detection scores. 21 SeverityOccurrenceDetectionRPN XX=

Manajemen Perawatan – 02 Analisa KegagalanArif Rahman – Universitas Brawijaya Truck Stop Coffee Process Map 22 Inputs Outputs InputsOutputs Hot Water Soap Scrubber Clean Carafe Cold Water Measuring Mark Full Carafe Filter Maker w/Filter Fresh Coffee Dosing Scoop Maker w/Filter & Coffee Brewing Coffee Cleaned Carafe Dirty Water Wet Scrubber Full Carafe Filled Maker Empty Carafe Maker w/Filter Maker w/Filter & Coffee Operating Maker Heat Brewed Coffee Hot Coffee Customer Order Size Specification Complete Order Hot Coffee Cup Filled Cup Customer Cream Sugar Amount Desired Complete Order Money Coffee Delivery Complete Order Filled Cup Customer Reply Amount Specified Complete Order Make Change Temperature Taste Strength Smile Happy Customer Pour Coffee into Cup Offer Cream & Sugar Complete Transaction Say Thank You Receive Coffee Order Clean Carafe Fill Carafe w/Water Pour Water into Maker Place Filter in Maker Put Coffee in Filter Select Temperature Setting Turn Maker On

Manajemen Perawatan – 02 Analisa KegagalanArif Rahman – Universitas Brawijaya Truck Stop Coffee C&E Matrix 23

Manajemen Perawatan – 02 Analisa KegagalanArif Rahman – Universitas Brawijaya Step 1: For Each Input, Determine the Potential Failure Modes 24

Manajemen Perawatan – 02 Analisa KegagalanArif Rahman – Universitas Brawijaya Step 2: For Each Failure Mode, Identify Effects and Assign Severity 25

Manajemen Perawatan – 02 Analisa KegagalanArif Rahman – Universitas Brawijaya Step 3: Identify Potential Causes of Each Failure Mode and Assign Score 26

Manajemen Perawatan – 02 Analisa KegagalanArif Rahman – Universitas Brawijaya Step 4: List Current Controls for Each Cause and Assign Score 27

Manajemen Perawatan – 02 Analisa KegagalanArif Rahman – Universitas Brawijaya Step 5: Calculate RPNs 28

Manajemen Perawatan – 02 Analisa KegagalanArif Rahman – Universitas Brawijaya Step 6: Develop Recommended Actions, Assign Responsible Persons, and Take Actions 29

Manajemen Perawatan – 02 Analisa KegagalanArif Rahman – Universitas Brawijaya Step 7: Assign the Predicted Severity, Occurrence, and Detection Levels and Compare RPNs 30

Manajemen Perawatan – 02 Analisa KegagalanArif Rahman – Universitas Brawijaya 31 Akhir Perkuliahan… … Ada Yang Ditanyakan