PSN Inventory Management: Reorder Point and State Model
A calculation-ready operating model for country-specific code inventory, from quarantine and available-to-promise through reorder review and delivery reconciliation.
Quick answer
Manage every code as a country-specific SKU with an explicit lifecycle state. Forecast only approved sellable units, subtract reservations and holds, and calculate the reorder point from your own demand and replenishment history.
SKU identity contract
| Field | Example purpose | Failure it prevents |
|---|---|---|
| Account country | US, KSA, UAE, FR, DE, NL | Currency-based region mixing |
| Currency and face value | USD 50, EUR 100, HUF 20,000 | Wrong product or substitution |
| Supplier batch and order reference | Trace source and delivery | Unreviewable support case |
| Lifecycle state | Quarantine, approved, reserved, sold, held | Double allocation or premature release |
| Customer order reference | Bind the sold code to fulfillment | Broken reconciliation |
Four inventory formulas
| Metric | Formula | Interpretation |
|---|---|---|
| Available to promise | Approved codes - reserved codes - held codes | Units that may enter a new order. |
| Average daily demand | Completed units in lookback / selling days in lookback | Calculate separately for every country and face value. |
| Reorder point | Average daily demand x replenishment lead time + safety stock | Trigger review when available to promise reaches this level. |
| Days of cover | Available to promise / average daily demand | Undefined when observed demand is zero; do not invent a value. |
| Suggested order | max(0, target stock - available to promise - confirmed inbound) | A review proposal, not an automatic purchase. |
Worked example
If a country/value SKU averages 4 completed units per day, observed replenishment takes 3 days, and the approved safety stock is 8 units, the reorder point is 20 units: (4 x 3) + 8. These numbers illustrate the formula and are not an Alpha PSN performance claim.
Lifecycle state model
| State | Can be sold? | Required transition evidence |
|---|---|---|
| Received | No | Expected country/value/quantity record exists. |
| Quarantine | No | Import, duplicate, and sample checks are pending. |
| Approved | Yes | Batch reconciles and country labels are intact. |
| Reserved | No to other orders | Customer order owns the unit. |
| Sold | No | Delivery record is complete. |
| Held | No | Issue or mismatch requires review. |
| Replaced / retired | No | Original and remedy references remain linked. |
Forecast worksheet
Keep one row per country and denomination. Do not pool US, KSA, and UAE because all use USD, or France, Germany, and the Netherlands because all use EUR.
| Input | Recommended grain | Evidence window |
|---|---|---|
| Completed units | Country + face value + channel | Recent and comparable historical periods |
| Stockouts | Country + face value | Timestamped incidents |
| Held / replacement cases | Batch + reason | Issue lifecycle |
| Confirmed inbound | Country + value + expected date | Written supplier confirmation |
| Campaign demand | Named campaign + recipient country | Approved forecast, not generic seasonality |
Automation boundary
Alpha PSN does not claim a public live inventory endpoint on this page. A buyer may automate its own ledger and alerts, while any supplier interface, fields, update frequency, or order transport requires a written partner scope. Start with a reviewable reorder proposal and explicit approval.
Alpha PSN commercial boundary
The standard minimum is 20 cards and settlement is USDT only. After payment confirmation, codes are sent in a password-protected one-time encrypted note. The customer email address is the password, and the note can be opened once. Public catalog pages do not publish unit prices.
Weekly control check
- Reconcile approved, reserved, sold, held, and inbound quantities.
- Review demand and days of cover by country and value.
- Investigate negative stock, duplicate references, and country-field loss.
- Update safety stock only from observed lead-time and demand variability.
- Keep sold-out catalog values outside the order proposal.
Use the seasonality worksheet for event scenarios and the mix calculator for a controlled starter allocation.