Physical quantity and readiness are different
Goods can be inside the warehouse while requiring investigation. Damaged packaging, an unconfirmed batch or a return awaiting assessment are examples.
Do not remove that quantity from knowledge of the inventory. Distinguish it from stock available for ordinary picking, preserving both visibility and clear interpretation.
Status needs meaning and an owner
For stock marked “to check”, identify the concern, decision-maker and physical location. A colour or document note alone may not be sufficient for the picker.
Also define when status changes. Receiving a return does not establish that it can be sold again. Completing an inspection activity is likewise different from obtaining a satisfactory result.
Check what the picker sees
Test an order for a product held in several statuses. Does the operator understand which quantity can be picked? Does an exception require the appropriate decision?
For a quality lead, continuity from the initial concern to the assessment outcome matters. WMS can distinguish inventory types and retain history. Rules for releasing stock, and how they are enforced, must fit the organisation's process.