Recently, a system integrator's warehouse reported that a batch of 10G optical modules was mixed with a small amount of products of different distances. Because the box-by-box check was done on the day of receipt and samples were retained simultaneously, the problem was discovered before it was put on the shelves and did not affect the cutover window. Here we review the interception and processing process.

The difference can be seen first from the batch number and label.

The goods arrived in four boxes. The batch number of one box did not match the test report included with the goods. The two distance ranges of 10KM and 40KM were mixed on the label. The inspector opens the boxes and counts them, picks out the suspicious items, and compares themSFP+ 10G single-mode dual-fiber 10km optical moduleThe nominal parameters and the number of report lines, confirm the mixed quantity and the involved box numbers.

Use retained samples for comparison instead of sending back the entire batch

The two sealed samples from the previous batch of the project came in handy at this time: comparing the retained samples with the suspicious ones side by side, comparing the label printing, tab color and shell screen printing, it was quickly determined that they belonged to different production line batches. Because the retained samples are numbered and have a receipt record, both parties accept the conclusion. There is no need to send the entire batch of goods back to the factory for testing, saving two weeks of travel.

The comparison process is carried out jointly by the warehouse and the project technical person in charge. The conclusion is recorded in the acceptance ledger on the spot and photographed for record keeping, to avoid having different opinions afterwards.

The disposal is to exchange the goods instead of returning the whole batch.

In the end, the goods will be exchanged according to the mixed quantity, and the unmixed parts will be used as usual. At the same time, it is agreed that subsequent shipments will be divided into boxes according to distance and the gear will be marked on the outside of the box. Based on this, EB-LINK adjusted the distribution review action. Multi-level orders were changed to separate boxes for labeling and two-person sign-off. The corresponding relationship between box numbers and stalls was rechecked when leaving the warehouse. Label printing was also changed to use only one batch number segment for the same box.

Mixing materials is difficult to detect on-site with instruments. It relies on comparison of batch records and retained samples. Recording batch numbers per box during inventory is much less labor-intensive than tracing them afterward. For projects that require sample registration and unpacking verification templates, please call 0755-83179002.