approval workflow

An approval workflow is a defined sequence of review, decision, and authorization steps used to evaluate and approve a record, document, transaction, or process action. In manufacturing and regulated operations, it commonly refers to how items such as work instructions, quality events, deviations, change requests, purchase actions, or batch-related records move through assigned reviewers and approvers before they can be released or closed.

The term includes both the route an item follows and the rules that govern it, such as required roles, approval order, conditions, due dates, and status changes. It may be managed on paper, but in modern MES, ERP, QMS, PLM, or document control systems it is usually implemented as a digital process with user assignments, timestamps, comments, and audit trail data.

An approval workflow does not mean the same thing as a general business process or a notification-only process. Its defining feature is that one or more people or authorized roles must make a formal decision, such as approve, reject, send back for revision, or escalate.

Where it appears in operations

• Document control for SOPs, specifications, and work instructions

• Engineering change and revision approval

• Nonconformance, deviation, concession, or CAPA review

• Batch record, DHR, or e-signature based release steps

• Supplier, purchasing, or outsourced processing approvals

• Training record or qualification sign-off

Operational meaning in systems

In software, an approval workflow usually appears as status-driven routing. A record moves from one state to another, such as draft, under review, approved, rejected, or effective, based on configured rules and user actions. Depending on the system, the workflow may support parallel approvals, sequential approvals, delegated approval, conditional routing, required comments, and electronic signatures.

Approval workflows are often linked to version control, access control, and evidence trails. For example, a revised work instruction may remain unavailable to production until all required approvers complete review and the new version is formally released.

Common confusion

Approval workflow vs. review workflow: A review workflow may collect comments without requiring formal authorization. An approval workflow ends with a decision that changes status or allows release.

Approval workflow vs. change control: Change control is the broader managed process for assessing and implementing change. The approval workflow is often one part of that process.

Approval workflow vs. authorization: Authorization can mean permission based on a role or system access. Approval is a specific decision on a specific item.