encyclopedia

RELIABILITY ASSESSMENT

An analytical determination of numerical reliability of a system or portion thereof without actual demonstration testing. Such assessments usually employ mathematical modeling, use of available test results, and some use of estimated reliability figures. (NTSC)

RELIEF OUTFIT

Train used to support the repair of derailments or other damage, usually included cranes, replacement track, tools, wheels and supplies, and a car for cooking and serving meals.

RELIEF PERSON (RELIEF MAN)

An operator who replaces another operator at the completion of the relieved operator’s assigned run or portion of run. (TRB)

RELIEF POINT

A designated stop on a line where one operator ends his/her driving assignment and is replaced by the operator who will continue operation of the trips in the block or assignment. Usually this is accomplished by having the replacement operator…

RELIEF RUN

A driving assignment which covers the scheduled days off of other operator’s regular assignments.

RELIEF TIME

The time at which operators report to specified points (relief points) to relieve and be relieved. (TRB)