What inventory management covers
Inventory is the stock a business holds to sell or to use: raw material, packing material, work in progress, finished goods and spares. Managing it means keeping one true record of four things for every item: how much you have, where it is, what it cost, and when you need more.
The record stays true only if every movement is written down when it happens. Those movements are the same in almost every business.
| Movement | What happens | Usual document |
|---|---|---|
| Receipt | Goods arrive from a supplier | Goods receipt note (GRN) against a purchase order |
| Issue | Material goes to production, a site or a department | Material issue slip |
| Transfer | Stock moves between godowns or branches | Delivery challan or transfer note |
| Sale | Goods leave for a customer | Tax invoice and delivery challan |
| Return | Goods come back from a customer or go back to a supplier | Credit note or debit note |
| Adjustment | A count finds a difference, or stock is damaged or expired | Stock adjustment, with a reason |
The terms you will meet
- SKU one distinct item you stock, such as one size and colour of a product.
- Godown and bin the warehouse, and the exact rack or shelf within it.
- Batch or lot a quantity made or received together, often with a manufacturing and expiry date.
- Reorder level the quantity at which you place the next order, so stock arrives before you run out.
- Cycle count counting a few items regularly instead of the whole godown once a year.
- Landed cost the purchase price plus freight, duty and other costs of getting the goods to you.
How stock is valued
Your stock is an asset on the balance sheet, so it has to carry a value, and the method you choose changes both that value and your profit. Indian accounting standards allow FIFO (first in, first out) or weighted average cost. LIFO is not permitted.
Separately from valuation, businesses with perishable or dated goods often issue stock by expiry rather than by arrival, sending out the batch that expires first. That is a picking rule, usually called FEFO, and it matters for food, pharma and chemicals.
Where it goes wrong
- Stock on the system and stock on the shelf disagree, so people stop trusting the system and walk to the godown to check.
- Material leaves the store without a slip, so issues are never recorded and consumption is guessed at month-end.
- Nobody sets reorder levels, so buying runs on memory and fear, and cash ends up in stock that does not move.
- Transfers between godowns are recorded at one end but not the other, so the same goods exist twice or not at all.
- Goods sent to a job worker vanish from the record while they are away, even though they are still your stock.
The Indian specifics
GST ties stock to documents. A sale needs a tax invoice, and goods moving between your own godowns under the same GSTIN travel on a delivery challan. A transfer to a branch registered under a different GSTIN is treated as a supply under GST and needs a tax invoice, even though the goods never left the company. Moving goods by road may also need an e-way bill.
Material sent out for job work stays your stock while it is with the job worker, and it moves on a challan rather than an invoice. It needs tracking until it comes back; the guide on job work management covers how.
Spreadsheet or software?
A spreadsheet works while one person keeps it and there are few items, one godown and no batches. It stops working when several people need to record movements at the same time, when stock sits in more than one place, or when you have to trace a batch from receipt to the customer.
Inventory software records each movement against its document, so the stock figure updates as the GRN, the issue or the invoice is saved. In an ERP the same entry also updates accounts and purchasing, so stock, payables and GST all agree without anyone re-typing.
In short
- Inventory management is one true record of how much stock you have, where, at what cost and when to reorder.
- The record stays true only if every receipt, issue, transfer and sale is recorded when it happens.
- In India, stock movements are tied to GST documents: invoices, challans and sometimes e-way bills.
- Software earns its place once several people, godowns or batches are involved.