Procedure to Establish Inspection Intervals of Regularly Maintained In-Service Units Subject of Failure

Mengert, Peter; Davin, J.; Weinstock, H.; John A. Volpe National Transportation Systems Center (U.S.)

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Procedure to Establish Inspection Intervals of Regularly Maintained In-Service Units Subject of Failure

1996-05-01
By Mengert, Peter ; Davin, J. ; Weinstock, H.

[PDF-2.43 MB]

English

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Creators:

Mengert, Peter ; Davin, J. ; Weinstock, H.

Mengert, Peter ; Davin, J. ; Weinstock, H. Less -
Corporate Creators:

John A. Volpe National Transportation Systems Center (U.S.)
Subject/TRT Terms:

[+]

Equipment Maintenance Exponential Failure Failure Failure Rate Human Factors Inspection Inspection Interval Level Of Confidence Maintenance Maintenance Practices Mathematical Prediction Mechanical Failure Probability Railroads Railroad Safety Reliability Repair Simulation Statistical Formula
Publication/ Report Number:

DOT-VNTSC-FRA-95-9 ; DOT/FRA/ORD-96/04

DOT-VNTSC-FRA-95-9 ; DOT/FRA/ORD-96/04 Less -
Resource Type:

Tech Report
Geographical Coverage:

United States
Edition:

Final Report June 1990 - June 1995
Corporate Publisher:

United States. Department of Transportation. Federal Railroad Administration
Abstract:

Procedures have been developed for determining the period between regular inspections that is required to ensure, with a specified level of confidence, that no more than a certain percentage of the units of a population that is in service is failed. The procedure assumes that the units have a uniform random failure rate and that the population is divided into many equal sized groups. These groups are inspected sequentially at a uniform rate over the inspection interval, repaired if necessary, and returned to service. A new inspection interval is calculated based on the number found failed in an initial inspection interval. Comparisons of repeated simulations of the percentage of in-service units of the population using randomly generated data have determined that the procedure fs useful when the population is greater than 100 units and the percentage of the population found failed at inspection is less than IX. These procedures, combined with engineering data and experience, may be applied to the definition of approaches for ensuring safety of equipment in railroad operations.
Format:

PDF
Funding:

RR528/R5025
Collection(s):

Federal Railroad Administration Volpe Center
Main Document Checksum:

[+]

urn:sha256:f1b638eeddb83e863fe3080b36702656455c161aaa53ff11772a13146f1bf4e5
Download URL:

https://rosap.ntl.bts.gov/view/dot/8718/dot_8718_DS1.pdf
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Procedure to Establish Inspection Intervals of Regularly Maintained In-Service Units Subject of Failure

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