Work in process is the items of work that sit between processing steps. In lean systems, standardized work in process is the minimum number of parts, including units inside machines, needed to keep a cell or process flowing smoothly.
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Study notes
WIP covers items of work between processing steps.
Standardized WIP includes units in machines as well as parts waiting between steps.
Standardized WIP is set to the minimum number of parts needed for smooth flow in a cell or process.
The document cross-references Inventory for related reading.
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