PAPERS |
Masayoshi SHIGEMORI
Double check is executed intentionally to detect human errors after maintenance work. However, no papers mentioned for double-checking have been studied. To reveal problems of double check at a working site therefore, four cases of maintenance work of Shinkansen were observed at beginning of the study and analyzed from the following viewpoints; (a) work load for double check, (b) memory load for cross-checking actual and listed items, (c) communication among checkers or between director and checker, and (d) dependency on other workers or reconfirmation. The analysis showed seven problems about double check. There are too many double checks (a), too many checklists (a), inconsistency of definitions of double check (c), effect of triple check (a) and (d), filling checklists with check items during double check (a) and (b), uncertain roles of checkers (d), and uncertain procedure of double check (c) and (d).
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