WIP tracking

WIP tracking, or work-in-progress tracking, commonly refers to the systematic monitoring and recording of materials, components, and partially completed products as they move through manufacturing or maintenance operations.

What WIP tracking includes

In industrial and regulated environments, WIP tracking typically covers:

• Identifying each work order, batch, serial number, or lot in process
• Recording the current operation, work center, or station for each unit
• Capturing timestamps for start, pause, and completion of operations
• Tracking quantities (e.g., started, in process, completed, scrapped, reworked)
• Linking WIP to travelers, digital work instructions, and inspection steps
• Providing status and location visibility to production, planning, and quality teams

WIP tracking can be performed with paper travelers, barcodes, RFID, andon boards, or integrated execution systems such as MES, and is often tied to ERP for inventory and costing.

Where WIP tracking is used

WIP tracking is used across discrete manufacturing, process manufacturing, and MRO environments to support:

• Shop-floor visibility, including queues, bottlenecks, and idle WIP
• Production planning and materials replenishment
• Traceability and genealogy of parts and assemblies
• Quality control, nonconformance handling, and rework routing
• Inventory valuation and work-in-process accounting

What WIP tracking is not

WIP tracking is related to, but distinct from:

• Production scheduling: defines when work should happen; WIP tracking records what is actually happening.
• Inventory management of raw or finished goods: focuses on materials not currently in process, while WIP tracking focuses on items actively being worked.
• Performance analytics (OEE, NPT, etc.): uses data from WIP tracking but is focused on KPI calculation and analysis.

Operational meaning

Operationally, WIP tracking shows up as status boards, dashboards, or reports that answer questions such as:

• Where is this work order, lot, or serial number right now?
• How many units are at each step, waiting, running, or completed?
• Which operations are holding WIP and driving lead time?
• Which parts are tied to specific inspections, test results, or deviations?

In regulated industries, WIP tracking data is often part of traceability and electronic records used to reconstruct the as-built history of a product or assembly.

Common confusion

• WIP tracking vs. WIP control: tracking is the act of observing and recording; control refers to managing WIP levels (for example, through kanban limits or queue caps).
• WIP tracking vs. asset tracking: WIP tracking focuses on product units and orders; asset tracking focuses on tools, equipment, or fixtures.