Computers and office equipment: counting by serial number

Laptops, monitors and printers pass quickly from one employee to another: when someone leaves, the device is given to another person, swapped in a department, sent for repair and sometimes lost on the way. Yet the books still show the line "Laptop, 15 inch, 1 pc". Between the list in the books and the real desk there is one reliable link: the serial number. Below: how to count computers and office equipment by that number, match the result with the books and what to watch for.

Why not by name

Counting by name, 40 identical monitors may come to exactly 40, but it stays unknown which one sits with which employee. When a device is replaced, the new one runs under the old name, a different unit may return from repair, and "one printer" on the books turns out to be two. The serial number makes each device unique: both the line in the books and the desk are tied to that number. This is especially noticeable in large offices, where computers are often reassigned between departments.

Where to find the serial number

• on a laptop: the label on the bottom cover or in the battery bay;
• on a monitor or printer: the rear panel or a label on the side;
• on the box and the warranty papers (if kept);
• by software: in the operating system or BIOS information, if the label has worn off;
• on a printer: sometimes the test page or an internal label.

Two cases need care. First, the label has worn off or something else has been stuck over it. Second, if the main board of a device has been replaced, the internal number may differ from the one on the casing; such a case is recorded with a note.

The counting procedure

1. Prepare the book list with serial numbers. Devices whose number is missing from the books are marked separately.
2. The route is built by department or room. The count runs while the employee is at the desk.
3. The serial number is read with a scanner or a phone camera. Typing by hand causes errors: zero is confused with the letter O, one with the letter I.
4. The number, the asset tag and the device are photographed together.
5. If there is no asset tag, one is stuck on; if there is, its number is checked.
6. Matching is done by serial number and results fall into four groups: matched; on the books but not found; found but not on the books; different serial number (the device was replaced).

The results table usually has these columns: asset number, type, model, serial number, employee, room, condition, line in the books, photo number and a note.

An illustrative example: 280 devices

Suppose the books list 280 devices: 150 laptops and computers, 90 monitors, 40 printers. The count result: 262 match exactly by serial number; 8 have a number different from the books (replaced after repair); 10 are not found (262 + 8 + 10 = 280); in addition 7 devices were found that are not on the books. So 262 + 8 + 7 = 277 devices were actually inspected. Each group is now handled separately: details of the replaced ones are updated, the missing ones are asked about among staff, branches and repair shops, and the origin of those missing from the books is established: leased, a gift, or simply never booked. Which device is written off or put on the books is for the chief accountant and management to decide. Estimate the time too: if each device takes 2 minutes on average (an illustrative value), 280 × 2 = 560 minutes, about nine hours of one person's work. With two people it fits into one working day.

Remote devices and data security

Devices of employees who work from home or in another city are also counted. A separate list is made for them and confirmation is requested: for example, the employee sends a photo of the serial number label or shows it on a video call. Mind data security: the counter does not open the device, does not look at the information on the screen and only reads the external label. If the software method is needed, the employee shows the number. A confidentiality agreement must be signed with the counting team.

Conclusion

Counting by serial number turns office equipment from "some laptops" into a list of specific devices. Inventory carries out fixed-asset counts, tags the equipment, prepares and applies barcode and QR labels, builds the register and shows the differences in the report together with the analysis.