How the Packing Reconciliation Calculator works

Packing reconciliation is the final count of a batch. It compares the theoretical number of packs from the batch formula, normally the total blisters produced divided by the blisters per pack, with the number of packs actually produced, and lists the loss. The sample packs taken for quality control and retention are shown as their own line, so that the unexplained loss is visible.

Packing arithmetic

Example: 10,000 theoretical packs

The theoretical number of packs is 10,000. The actual number of packs is 9,860, and 40 sample packs were taken.

1. Loss = 10,000 − 9,860 = 140 packs
2. Other loss = 140 − 40 = 100 packs
3. % Yield = 9,860 ÷ 10,000 × 100 = 98.6%

The 100 packs of other loss are the quantity that must be explained by rejects, such as missing leaflets, carton defects and short blister counts.

Packing yield and printed materials

• Limits: use the packaging yield limit in the batch record.
• Printed materials: cartons, leaflets and labels carry batch information, so their issue, use, return and destruction must reconcile, and any discrepancy must be investigated before the batch is released.
• Samples: QC and retention samples are planned and recorded, so they do not count as unexplained loss.
• Complete accounting: actual packs, samples, rejects and returns should add back to the theoretical figure.

Practical tips for packing lines

Count rejects at the end of each shift and record them against the batch, so the reconciliation at the end of the run is a check and not a reconstruction. Common causes of pack loss are missing or damaged leaflets, carton print or seal defects, and short blister counts caught during in-process checks. Do not close the record until every difference is either assigned to a documented reject or investigated.

Packing reconciliation errors

• Counting samples twice, once as sample and once as loss.
• Starting from the wrong theoretical number of packs.
• Not reconciling printed packaging materials.
• Closing the batch record with an unexplained difference.
• Mixing pack and blister counts.

If the pack count is short

Confirm the theoretical number of packs first, since it comes from the upstream blister count and any error there carries through. Then separate the planned samples from the other loss, which is what the calculator shows, and look only at the other loss. Check the reject bins from the cartoner and the checkweigher, the cartons removed for print defects and the packs opened for leaflet checks. Reconcile the printed cartons and leaflets issued against those used, rejected and returned. Do not release the batch until every difference is accounted for or formally investigated.

Finally, review the trend over several batches. If the same loss appears on each batch of a product or on one particular line, it is probably a process or equipment cause and not random handling. Recording the cause code for every reject makes this trend visible, and it supports the corrective action that a repeated loss requires.

Standards and references

The checks on this page relate to the documents below. Standards are revised from time to time, so confirm the current edition and follow your own approved procedures.

• 21 CFR 211.103, Calculation of yield
• 21 CFR 211.188, Batch production and control records
• 21 CFR 211.192, Production record review
• EU GMP Part I, Chapter 5, Production
• 21 CFR 211.130, Packaging and labeling operations

Questions on packing reconciliation

How do I calculate the theoretical number of packs?

It comes from your batch formula, usually the total blisters divided by blisters per pack.

Why are sample packs shown inside the loss?

It keeps the full count visible in one place, so a reviewer can see both the planned sample deduction and the remaining loss.

What causes genuine pack loss?

Packs rejected for missing or damaged leaflets, carton print or seal defects, and short blister counts.

Related tools and guides: Expiry Date Calculation · Yield Above 100% · Batch Reconciliation Explained · Investigating a Reconciliation Failure · Blister Reconciliation · Yield Loss Points Across Stages

By Sajjad Ahmad. For reference and education only; verify limits against your SOPs and the current pharmacopoeia. See the methodology.