CHAPTER 7Collecting assembly time data

Collecting time data is aprerequisite to improving assembly operations, but itis more difficult inpractice than one would expect. In mostfactories, itis eithernot done at all ordone with methods that do notprovide accurate results. Operatorinterviews or retrieval of numbers of unknown origin from ERP databases are not appropriate methods. Predetermined time standards methods like MTM orMOST should be applied only in new line projects, where there there are no operations that can be measured. Otherwise, time studies should be conducted, with stopwatches or through video recordings, afterexplaining thepurpose of the studies to the affected operators, securing theircon- sentbefore taking measurements, involving ...

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