| Title | Procedure to Establish Inspection Intervals of Regularly Maintained In-Service Units Subject of Failure |
|---|---|
| Record ID | 33643 |
| Personal Name Creator |
Mengert, Peter; Davin, J.; Weinstock, H. |
| Source | 88p. in various pagings |
| Corporate Creator | John A. Volpe National Transportation Systems Center (U.S.) |
| Publisher | United States. Department of Transportation. Federal Railroad Administration |
| Publication Date | 19960500 |
| Language | English |
| 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. |
| Rosap ID | dot:8718 |
| Rosap URL | https://rosap.ntl.bts.gov/view/dot/8718 |
| TRT Terms | Inspection; Failure; Mathematical prediction; Railroads; Railroad safety; Maintenance practices; Maintenance; Equipment maintenance; Reliability; Mechanical failure; Human factors |
| General Subjects | Inspection; Reliability; Failure Rate; Repair; Probability; Simulation; Exponential Failure; Inspection Interval; Statistical Formula; Level of Confidence |
| Classification | NTL - SAFETY AND SECURITY - SAFETY AND SECURITY; NTL - SAFETY AND SECURITY - Human Factors |
| Geographical Coverage |
United States |
| TRIS Online Accession No |
941435 |
| Contract Number | RR528/R5025 |
| Report Number | DOT-VNTSC-FRA-95-9; DOT/FRA/ORD-96/04 |
| Availability | Volpe National Transportation Systems Center, Technical Reference Center |
| Resource type | Tech Report |
| URL | https://ntlrepository.blob.core.windows.net/lib/33000/33600/33643/33643.pdf |
| Alternative URL | https://ntlrepository.blob.core.windows.net/lib/42000/42600/42682/ord9604.pdf |
| Format | |
| Database | NTL Digital Repository |