This is a ready-to-use work instruction for the two most frequently cited second-person checks in finished-drug manufacturing: verifying a component dispensing or charge-in step, and clearing a line before it runs the next lot. Replace every <<FILL: ...>> placeholder. Two filled specimens follow, one for each check. This is the task-level detail underneath your parent batch record SOP; it does not replace it.
Control header
| Field | Entry |
|---|---|
| Document title | Line Clearance and Second-Person Verification |
| Document number | <<FILL: WI-ID, e.g. WI-MFG-018>> |
| Version | <<FILL: version>> |
| Effective date | <<FILL>> |
| Parent SOP | <<FILL: SOP-ID for production and process control>> |
| Owner | <<FILL: role, e.g. Manufacturing Manager>> |
Purpose
To define how a second person independently verifies a dispensing or component charge-in step, and how a line is cleared before it runs a new lot or a new product, so that the checks 21 CFR 211.101(c), 211.103, and 211.130 require are performed for real, not signed as a formality.
Part 1: second-person verification of dispensing and charge-in
The core rule
Operator A performs the weighing or measuring and the charge-in of a component.
Operator B, a different qualified person, independently confirms the identity of the component, the weighed or measured amount, and that it is charged into the correct batch, before or as the material is used. Operator B does not merely initial a form Operator A filled in; Operator B independently observes or re-verifies the specific fact being checked.
Per-step actions and acceptance
| Step | Action | Acceptance |
|---|---|---|
| 1 | Operator A selects the component and confirms the label against the batch record component list. | Component name, code, and lot number on the label match the batch record exactly. |
| 2 | Operator A weighs or measures the component on a qualified, in-calibration instrument and records the reading. | Balance or instrument ID is current on the equipment log; reading recorded contemporaneously. |
| 3 | Operator B independently confirms the component identity, lot number, and weighed or measured amount, without relying solely on Operator A’s entry. | Operator B’s confirmation is a separate observation, not a re-reading of Operator A’s own note. |
| 4 | Operator B confirms the component is charged into the correct batch and that no other lot of the same component is open on the floor at the same time, unless segregated per <<FILL: SOP-ID for material segregation>>. | No commingling risk; if a second lot of the same component is present, it is physically separated and clearly identified. |
| 5 | Both operators sign and date the batch record step at the time the check occurs, not retrospectively. | Two distinct signatures with a plausible, close-together timestamp; no block-signing at end of shift. |
Common findings this prevents
- A single signature on a step the batch record shows as requiring two.
- Second-person verification performed by re-reading the first operator’s own note rather than an independent check.
- Two lots of the same component open on the floor with no segregation, creating a wrong-lot risk the second check was supposed to catch.
- Signatures dated and timed in a pattern that shows they were completed together at the end of the operation rather than at the time of the step.
Part 2: line clearance before a new lot or product
The core rule
Before a manufacturing or packaging line runs a new lot or a new product, all materials, labeling, in-process product, and documentation from the prior operation must be physically removed and verified absent, and the clearance must be documented before the new operation starts.
Per-step actions and acceptance
| Step | Action | Acceptance |
|---|---|---|
| 1 | Operator confirms the prior lot’s batch record is closed out and removed from the line area. | No prior-lot paperwork remains at the workstation. |
| 2 | Operator physically inspects the line, including feed tracks, reject stations, code readers, and any recessed or hard-to-see areas, for prior-lot material or labeling. | Visual inspection covers every point identified on the line-specific clearance map, not only the obvious surfaces. |
| 3 | Operator reconciles prior-lot labeling counts (issued, used, destroyed, returned) against the label issuance record. | Counts reconcile within the tolerance the parent SOP defines; any discrepancy is investigated before clearance is signed. |
| 4 | A second person independently re-inspects the line and confirms no prior-lot material, label, or documentation remains. | Second person’s inspection is separate from the first; both cover the full clearance map. |
| 5 | Both operators sign and date the line clearance record, stating the prior lot number cleared and the new lot or product about to start. | Clearance record is complete before the new operation begins, not backdated after it has already started. |
Common findings this prevents
- A stray prior-lot label found on a new-lot unit, traced back to an incomplete feed-track check.
- Line clearance signed after the new operation had already started, discovered from timestamps that do not line up.
- A second-person re-inspection that only re-checks the first inspector’s notes instead of physically re-inspecting the line.
- Label reconciliation discrepancies not investigated before the line was cleared to run.
Filled specimens
Specimen 1: dispensing verification. Example excipient charge-in for a film-coated tablet batch.
| Step | Entry |
|---|---|
| Component | Microcrystalline cellulose, lot MC-2026-118 |
| Weight recorded (Operator A) | 12.50 kg, Balance BAL-07, 09:14, M. Chen |
| Independent confirmation (Operator B) | Re-weighed and confirmed 12.50 kg on BAL-07, confirmed label and lot MC-2026-118 against batch record, 09:16, R. Okafor |
| Segregation check | No other lot of microcrystalline cellulose open on the dispensing floor at the time |
| Batch record signatures | M. Chen 09:14, R. Okafor 09:16 |
Specimen 2: line clearance. Example packaging line clearing lot 23A before lot 23B starts.
| Step | Entry |
|---|---|
| Prior lot | 23A, batch record closed and removed from the line 13:40 |
| Physical inspection (Operator A) | Feed track, reject station, and coder inspected per clearance map PKG-LINE-3, one stray lot 23A carton found in the reject bin, removed |
| Label reconciliation | 4,000 issued, 3,986 used, 14 destroyed, reconciles within tolerance |
| Second-person re-inspection (Operator B) | Independently re-inspected the same points 13:52, confirmed clear |
| Clearance signed | A. Suarez 13:45, T. Malik 13:52, prior to lot 23B start at 14:00 |
The reject-bin carton in Specimen 2 is exactly the failure mode line clearance exists to catch: a single stray unit of prior-lot packaging that a rushed or partial inspection would have missed.
Because the physical inspection covered the full clearance map rather than only the obvious surfaces, it was found and removed before the new lot started, and the clearance was signed only after both checks were complete.
Acceptance criteria (both parts)
- Every step requiring two people has two independent, contemporaneous signatures.
- The second check is a genuine independent observation, never a re-read of the first person’s entry.
- Any discrepancy found during either check (a wrong lot, a reconciliation gap, a stray label) is escalated and resolved, with a deviation raised per
<<FILL: SOP-ID for deviations>>where the discrepancy could affect product, before the operation proceeds. - Records are completed at the time of the check, with timestamps that plausibly reflect sequential, independent activity rather than a single block-signing event.
Common inspection findings this instruction prevents
- Pencil-whipped second-person verification, the single most cited pattern under 211.101, 211.103, and 211.130 together.
- A wrong-component or wrong-lot charge-in that a genuine second check would have caught.
- A label mix-up traced to an incomplete or rushed line clearance.
- Documentation completed after the fact rather than contemporaneously with the physical check.
How to adapt this instruction
- Set the document number and parent SOP in the header.
- Attach or reference your line-specific clearance map (the exact points to inspect) for each manufacturing and packaging line in scope.
- Set the material segregation SOP reference in Part 1, step 4, and the deviation SOP reference in the acceptance criteria.
- Use this instruction as the training and qualification basis for any operator or QA person performing a second-person check; document their qualification per
<<FILL: SOP-ID for personnel qualification>>. - Confirm the regulatory citations (211.101, 211.103, 211.130) against the current published regulation before issue.