Purchase order tracking: four states and re-confirm cadence
Track every open PO line through four states, from acknowledgement to receipt, so a slipping delivery surfaces while there is still time to react.
An open purchase order line can be acknowledged with no date, dated weeks ago, shipped, or at risk, and a status of "open" hides which. Track each line through four states instead, and a slipping delivery shows up while there is still time to expedite or replan.
What is purchase order tracking?
Purchase order tracking is the check on every open PO line of whether the supplier has acknowledged it, confirmed a date and shipped it, and whether your dock has received it. Tracking records which of those a line has reached, what evidence backs that up, and when someone last talked to the supplier.
Mark every unreceived line "open" and a line with a confirmed date looks the same as one nobody has heard from in three weeks. Splitting that single status into the states below shows which lines need a call today and which are simply waiting on their date.
What does a PO tracking view need for each line?
A usable tracking view needs four things on every line: its current state, the dates attached to that state, the date and method of the last supplier contact, and the evidence behind the state. Without evidence, the view shows only what suppliers said, and some of it may be weeks old.
- The line's current state comes first, whether acknowledged, date confirmed, shipped or received, so a glance shows how far it has moved.
- Two dates belong on every line: the need date your build requires and the date the supplier last confirmed. Comparing the two shows whether a line needs expediting or can be pushed out.
- Record who last reached the supplier, when, and by which channel, so the next person doesn't repeat a call that already happened.
- Evidence belongs on the line itself: the acknowledgement, the confirmed-date reply, the advance ship notice or carrier tracking number, and the receiving record, attached where the next person can see them without opening an email thread.
What are the four states of an open PO line?
Every open PO line sits in one of four states: acknowledged, date confirmed, shipped, or received. Each state needs its own evidence behind it, whether that's a reply, a shipping document or a receiving scan. The figure below shows what moves a line to each state and the question a planner should ask there.
The four states of an open PO line
A four-node left-to-right flow showing the states of an open PO line: acknowledged, date confirmed, shipped, and received. Each node lists the evidence that moves a line into that state and the follow-up question a planner should ask while the line sits there, along with where a line commonly stalls at that state.
- 1
Acknowledged
- Evidence that moves a line here
- The supplier confirms receipt of the PO
- Follow-up question at this state
- Has the supplier committed a quantity, price and date on each line yet?
- Where it commonly stalls
- Receipt confirmed, but no line-level dates follow
- 2
Date confirmed
- Evidence that moves a line here
- The supplier states a quantity, price and ship date per line, and any change is approved
- Follow-up question at this state
- Is this date still current, or has it gone stale against the lead time?
- Where it commonly stalls
- A date agreed weeks ago that nobody has re-confirmed
- 3
Shipped
- Evidence that moves a line here
- An advance ship notice (X12 856 or EDIFACT DESADV) or a carrier tracking number tied to the line
- Follow-up question at this state
- Does the shipped quantity match the confirmed quantity, and will it arrive by the need date?
- Where it commonly stalls
- A confirmed date with no ASN and no tracking number behind it
- 4
Received
- Evidence that moves a line here
- The parts are booked in at receiving against the line; inspection accepts them where required
- Follow-up question at this state
- Does the accepted quantity match the full confirmed quantity, or is a scheduled delivery still open?
- Where it commonly stalls
- A partial receipt recorded as if the whole line had arrived
A line only becomes plannable once it reaches date confirmed, and first has hard evidence behind it once it reaches shipped, backed by an advance ship notice or a carrier tracking number.
The first two states mirror purchase order acknowledgement: the supplier acknowledges receipt, then commits a quantity, price and date on each line. Every date on a line is still a promise until it reaches shipped. An advance ship notice, sent as an X12 856 or EDIFACT DESADV message, or a carrier tracking number tied to the line, is the first hard evidence that the parts exist and are packed or on their way.
How often should you re-confirm a supplier's date?
Re-confirm a supplier's date on a cadence tied to the part's lead time. A date the supplier gave eight weeks ago is stale well before its due date arrives, even though the date hasn't passed. The table below shows one example cadence; set your own by how much warning a slip needs.
Re-confirmation cadence by lead time
A four-row example table showing an illustrative cadence for re-confirming a supplier's date, banded by the part's lead time: under 4 weeks checked twice a week plus a check just before the date, 4 to 12 weeks checked weekly, 13 to 26 weeks checked every two weeks, and over 26 weeks checked monthly with an added check as the date approaches. Each row gives the reasoning for that cadence. The table is explicitly labeled as one example, not a published standard.
| Lead time band (example) | Example re-confirmation cadence | Why |
|---|---|---|
| Under 4 weeks | Twice a week, plus a check a few days before the date | A short lead time leaves little room to absorb a surprise slip |
| 4-12 weeks | Weekly | A week's notice still leaves time to react to a slipping date |
| 13-26 weeks | Every 2 weeks | A longer lead time tolerates a slower check without losing reaction time |
| Over 26 weeks (for example, castings or forgings) | Monthly, plus a check as the date approaches | A long lead time leaves room, so a monthly check still catches a slip in time |
This is one illustrative cadence, not a published standard; set your own interval by how much warning a slip needs.
A part with a two-week lead time cannot absorb a two-week surprise, so its date needs checking twice a week, with an added check just before it's due. A nine-month casting has more room, so a monthly check still catches a slip in time. Whatever the interval, treat the last-confirmed date, not the original PO date, as what "stale" measures against. Your team can open each re-confirmation as a task and hand it to Scout Agent, who follows up with the supplier by email and phone.
How do you track partial shipments and split lines?
Treat every partial shipment as its own scheduled delivery instead of stretching a single date to cover it. A line that ships 60 of 100 units keeps two entries. One moves toward received, and the other stays open against its own confirmed date. Collapsing them into one line loses the half that is at risk.
Record the split the moment a supplier confirms it, so each scheduled delivery gets its own state, evidence and follow-up question. A partial ASN closes out only the quantity it covers, and the rest of the line stays open until its own ASN arrives. A kit still waiting on its second delivery still needs that delivery before it's ready to build, even with part of the line already on the shelf.
Should you check status before the due date or chase it after?
Check status a few days before the due date, while there is still time to react to what you learn. After the due date, a check can only tell you how late the part is. Once a due date passes without a received line, past-due purchase orders covers what happens next.
At scale, the hard part is looking at every open line each day to see which one has reached a checkpoint, and that is where lines get missed. Cartograph's readiness signals open a task when an order has no confirmed date, three days before a confirmed order's expected date, and when the date arrives and nothing has been received. Those timings are defaults, and admins can change them. Cartograph hands each task to your team or Scout Agent, who emails and calls the supplier for a confirmed date or a shipment status, within the permissions your team sets.
Where should a supplier's confirmation be recorded?
A confirmation counts once it is attached to the line itself, with the date, the quantity, the channel it came through, and who took it down. A portal entry, an email reply, or a phone call logged the same day all count equally, as long as the record sits on the line itself, where the next person can find it.
Suppliers serving several customers often juggle a different portal for each one, so keep email and phone open even where a portal exists, and log whichever channel answers. Supplier not responding covers escalation when neither channel gets a reply.
How does PO tracking feed clear-to-build and shortage reviews?
A clear-to-build check and a shortage review both start from the same tracking data: which lines have a confirmed date, which have hard evidence behind them, and which are stale or unconfirmed. Accurate states let both reviews find the part that gates the build.
Clear-to-build asks whether every part a kit needs is on hand or confirmed to arrive in time. A line stuck at acknowledged with no confirmed date cannot answer that question, even if its need date is still weeks away. A shortage review should work from the same evidence, starting with the lines that have the weakest evidence behind them, since a distant date with no confirmation behind it can be the bigger risk.
Questions teams ask
Does a confirmed date replace the need date on the PO?
No. Keep both on the line. The need date is what the build requires, and the confirmed date is what the supplier agreed to. Comparing the two tells a planner whether a line needs expediting or can be pushed out.
Should a line without a confirmed date be treated as late?
Not automatically. It is unconfirmed, which carries a different risk than late. The part may still arrive on time, but nobody has evidence of that yet. It still needs chasing today.
When can a line be closed?
A line closes once the ordered quantity is received and accepted, or the buyer cancels the balance. A partial receipt leaves the line open for the remaining quantity.
Who updates the state when a supplier confirms by phone?
Whoever takes the call records it immediately, with the quantity, date and channel, against the line. If nobody records a date given by phone, the next person checking the line sees no answer.
If your team tracks open purchase orders across many suppliers, talk to our team about how Cartograph's readiness signals open a task when an order needs a date or a status.