Why component distribution breaks generic inventory rules
Electronics component distribution runs on manufacturer part numbers (MPNs), not just internal SKUs. The same functional part may be sourced from two manufacturers with different MPNs, different lot codes, and slightly different specs—treating them as interchangeable in inventory records causes wrong parts to ship against a customer's approved bill of materials.
Packaging format multiplies the counting problem: a reel of passives might hold 5,000 units, a tray of ICs might hold 250, and a tube might hold 50—counting "3 reels" without recording units-per-reel makes on-hand quantity meaningless for anyone downstream, including a customer's own MRP system checking your quoted availability.
Distributors also inherit compliance and traceability obligations from their upstream suppliers: date codes, lot codes, and country-of-origin data often need to travel with the part through every transaction, not just live in a supplier's original paperwork.
What to track beyond a basic part count
Track each SKU by manufacturer part number, with the internal SKU as a secondary reference, and record units-per-package (reel, tray, tube, bulk) so a count of packages converts correctly to a count of individual units. Store lot and date codes per receipt so any batch can be traced backward to its original delivery if a customer reports a defect.
Set a minimum order quantity per part where the supplier or your own packaging format requires it, so a small quote doesn't promise a quantity you can't actually break out of a sealed reel. Track allocated-but-unshipped stock separately from available stock so a large quote against a customer doesn't get double-counted against a second buyer's inventory check.
StockFlow tracks stock by location and lot with phone barcode scanning, so receiving a pallet of reels or doing a cycle count on a high-turn part takes minutes instead of a manual tally sheet.
- Track by manufacturer part number, not internal SKU alone
- Record units-per-package to convert package counts to unit counts
- Capture lot/date codes at receiving for traceability
- Separate allocated stock from available-to-sell stock
Counting reels, trays, and bulk packaging accurately
Weight-based counting (weighing a reel or tray and dividing by unit weight) is standard practice for small passives where piece-counting by hand is impractical—but it needs a calibrated per-unit weight on file for each part, since a wrong reference weight compounds across every count using it.
Prioritize cycle counts on high-value ICs and allocated stock over low-cost passives; a miscount on a $0.01 resistor matters far less than a miscount on a part already promised to three different customer orders.
Multi-location distribution and customer allocation
Distributors operating from more than one warehouse need shared visibility so a sales rep doesn't quote available stock that's actually sitting in a different region's warehouse without a transfer already in motion. Reserving stock against a confirmed order—rather than just noting it in a spreadsheet—prevents the same reel being promised to two customers during a busy week.
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