The inventory between the start and end points of a production process. (Lean Construction Institute Glossary)

Other Definitions

Work-in-Process (WIP) see also Work in Process (WIP) Work-in-process, or WIP, refers to inputs that are still in the operation. Laundry still in the washer, the dryer or being folded would count as WIP in our example (as would laundry in transit to either the washer or the dryer)….

Work-in-Process (WIP) Number of units in the process at any point in time. If the process includes buffer inventories between steps, they the work-in-process is the total number of units being worked upon as well as waiting in the inventory between steps. The units in inventory are usually referred to as Work-in-process inventory, to distinguish them from raw materials inventory or finished goods inventory.(http://hbswk.hbs.edu/pubcontent/toolkit/operations/glossary.html)

J. Jerrald Hayes
I am ex-architectural woodworker and general contractor turned IT, Business and Project Management consultant, software developer wannabe senior division triathlete and ski racer, Yankee fan and founder of Paradigm-360.com, 360 Difference Mac4Construction.com,iOS4Construction.com and now TheBuildingAndRemodelingWiki.com too.
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