Enough labels on the shelf does not mean the run is ready

Make the revision part of the stock identity

Keep the product, pack size, language or market variant and approved artwork revision connected to the packaging item. The exact identifier depends on the ERP, but operators must be able to distinguish two visually similar rolls without opening a design file.

In the illustrative shortage above, only 2,000 current labels are available for 5,000 required packs. The planning exception is 3,000 labels. Showing an 8,000-label aggregate hides that decision and can encourage staff to substitute whatever is nearby.

A change affects more than the next purchase order

Before a revision takes effect, review open packaging orders, stock at external printers, materials already issued to the line and customer-specific finished-goods plans. Assign the disposition of old stock to the relevant product and quality owners. Software should record their decision and affected quantities; it should not decide that an obsolete label is acceptable because replacement stock is late.

At issue and return, capture revision and quantity. If the line receives 5,200 labels and returns 170, reconcile the remainder against good packs, damaged labels and other recorded consumption. The result is a useful control even before any machine-vision project begins.

Reconcile a roll after the run

Use an illustrative issue of 5,200 labels. The line produces 4,900 correctly labelled packs, records 130 damaged labels and returns 170 unused labels. The account balances: 4,900 + 130 + 170 = 5,200. If the return is only 120, there is a fifty-label difference to investigate. Automatically assigning that difference to scrap would conceal the missing explanation.

The returned roll needs a clear remaining quantity and revision identity. It may also need a status reflecting the business's approved handling process. If the next shift sees a full-roll quantity because the part-use was never recorded, the same material shortage will reappear during another run. A simple return scan with actual quantity can be more valuable than an elaborate planning dashboard.

Coordinate the effective change across departments

The artwork approval date, purchasing change date and production effective date may differ. Record each explicitly and identify the person who authorises the transition. A printer may already have work in progress, while a co-packer holds finished rolls that the local ERP does not show. Include those locations in the review before declaring the old revision fully controlled.

Commercial and quality owners should define whether any existing stock has an approved use, must remain restricted or requires disposal. The software can route and record those decisions. It must not infer permission from the amount of old stock or the cost of replacement. An agreed cutover plan should also explain which finished-goods orders are affected and how the team will identify them later.

Choose the control for the failure you are preventing

A scan at material issue can detect that the operator selected the wrong labelled roll. It does not establish that the contents of that roll match its label. A vision check may inspect a printed field, but it also needs a trusted reference and a defined response to unreadable images. These controls address different failures and should not be treated as interchangeable.

Ask the supplier to show three cases: the wrong revision selected, the correct revision with unreadable printing, and a legitimate new revision awaiting approval. The first two require different operational responses; the third should not be solved by making the new reference automatically acceptable. Record which checks are deterministic and which rely on a model, and who owns changes to each reference.

Where scanning and vision can help

A barcode check can compare the selected roll with the work order before use. Vision may help check printed text or code placement under controlled conditions, but its performance needs testing across real print variation, lighting and line speeds. Retain examples the system could not assess instead of forcing every frame into pass or fail.

Incoming and in-process inspection records are supported by products such as ERPNext. Treat that as a recordkeeping capability, not proof that the system understands your packaging requirements. A pilot should demonstrate a blocked wrong-revision issue and a complete record of the corrected material.

Source: Frappe / ERPNext · Incoming and in-process inspections. Reference details

Summary

Packaging readiness depends on the correct product, format and approved revision being available together. Revision control should follow the material from purchasing to line issue and return. Barcode or vision checks become useful once those identities and approval decisions are reliable.

What to do next

1. Compare the current artwork list with physical rolls, open orders and line-side stock.
2. Define a controlled disposition for each superseded revision.
3. Demonstrate a blocked wrong-revision issue and a reconciled part-used roll before rollout.