Analisa kegagalan
Download
1 / 31

ANALISA KEGAGALAN - PowerPoint PPT Presentation


  • 190 Views
  • Uploaded on

ANALISA KEGAGALAN. S2 TMI – UB 2010/2011. Fault Tree Analysis Failure Mode and Effect Analysis. Metode Pengukuran Resiko. Probabilitas : peluang atau kemungkinan kemunculan satu kejadian .

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about ' ANALISA KEGAGALAN' - emery-burt


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
Analisa kegagalan

ANALISA KEGAGALAN

S2 TMI – UB

2010/2011


Metode pengukuran resiko

Metode Pengukuran Resiko


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.

Definition


Definition1

  • 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.

Definition


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.

Fault Tree Analysis





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.

Failure Mode & Effect Analysis


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

FMEA Steps


Fmea steps1

  • 5. Calculate the Risk Priority Number (RPN) determine the ways in which the input can go wrong (failure mode)

  • 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

FMEA Steps


Failure modes and effects

Failure Modes and Effects

Failure Mode 1

Effect 1

Failure Mode 2

Effect 2

Failure Mode 1

Effect 1

Failure Mode 2

Effect 1

Failure Mode 1

Effect 2


Severity occurrence and detection

  • Severity always 1 to 1

    • 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

Severity, Occurrence, and Detection


Severity occurrence and detection1

  • Severity always 1 to 1

    • 1 = Not Severe, 10 = Very Severe

  • Occurrence

    • 1 = Not Likely, 10 = Very Likely

  • Detection

    • 1 = Likely to Detect, 10 = Not Likely to Detect

Severity, Occurrence, and Detection


Risk priority number rpn

Risk Priority Number (RPN)

Severity

X

Occurrence

X

Detection

=

RPN


Truck Stop Coffee Process Map detection scores.

Outputs

Inputs

Outputs

Inputs

Complete Order

Customer

Order

Size Specification

Hot Water

Soap

Scrubber

Cleaned Carafe

Dirty Water

Wet Scrubber

Receive Coffee Order

Clean Carafe

Clean Carafe

Cold Water

Measuring Mark

Full Carafe

Fill Carafe w/Water

Complete Order

Hot Coffee

Cup

Filled Cup

Pour Coffee into Cup

Filled Maker

Empty Carafe

Full Carafe

Customer Reply

Amount Specified

Complete Order

Pour Water into Maker

Filled Cup

Customer

Cream

Sugar

Amount Desired

Offer Cream & Sugar

Filter

Maker w/Filter

Place Filter in Maker

Maker w/Filter & Coffee

Maker w/Filter

Fresh Coffee

Dosing Scoop

Put Coffee in Filter

Complete Order

Money

Make Change

Temperature

Taste

Strength

Complete Transaction

Operating Maker

Heat

Brewed Coffee

Maker w/Filter & Coffee

Turn Maker On

Say Thank You

Smile

Happy Customer

Coffee Delivery

Hot Coffee

Brewing Coffee

Select Temperature Setting


Truck Stop Coffee C&E Matrix detection scores.









Akhir Perkuliahan… Detection Levels and Compare RPNs

… Ada Yang Ditanyakan


ad