Nonconforming Material
Nonconforming material is any raw material, component, work-in-progress, or finished good that fails to meet an approved drawing, specification, process requirement, purchase order, or customer/engineering standard. In manufacturing systems it is treated as a quality-controlled status: the item must be identified, segregated, tracked, and dispositioned through formal quality authority before it can be used, shipped, or returned to production.
On the shop floor, nonconforming material becomes live the moment incoming inspection or a line-side operator confirms a deviation. The affected lot is physically moved to quarantine, often an MRB or red-zone area, and tagged so it cannot be pulled into kitting or production. In the warehouse and ERP/WMS, the lot is placed on quality hold, blocking picking, work-order consumption, shipment booking, and release into active inventory while disposition is pending. Inventory accuracy depends on every unit being available, blocked, or rejected; mixing good stock with suspect stock destroys that accuracy. The NCMR record captures part number, lot/date code, defect description, source, inspection evidence, root cause, and final disposition, such as rework, use-as-is with concession, return to supplier, or scrap. The quarantine also triggers supplier containment, stop-ship actions, or 100% inspection of replacement lots, protecting downstream build and shipment flows from hidden schedule risk.
Is nonconforming material the same as defective material?
In manufacturing quality systems, it is broader: any material that fails a requirement is nonconforming, even if the failure is still under evaluation or the item has not yet been physically rejected.
What is the normal control sequence after detection?
Confirm the deviation, tag the lot, segregate it, place a system hold, generate an NCMR, perform impact containment, and route disposition through MRB or equivalent authority.
What disposition options are commonly used?
Rework, repair, sort/inspect, use-as-is with concession, return to supplier, or scrap, depending on the governing quality procedure and authorization level.