Procurement in Manufacturing: 6 Shortages That Don't Need a New PO

The purchase order for 200 bearings arrives Friday. Assembly needs 40 of them Thursday morning. The shortage list shows a red line, and the reflex is to raise a new purchase order. But any new supplier needs two weeks. A new PO won't save Thursday. It will just put 200 extra bearings on the shelf in two weeks' time.

Manufacturing procurement is the work of getting purchased materials into the plant when production needs them, at a sensible total cost. That includes placing new purchase orders, but just as often it means changing the ones already open. Here are six shortages where the right answer is something other than a new order.

1. The order exists but is late: pull it in

Call the supplier and ask for part of the order early. You don't need all 200 on Thursday, only 40. Many suppliers can send 40 by courier from stock and ship the rest Friday as planned. MRP systems flag this situation with a reschedule-in message: the supply exists, but its date is later than the need. The mirror image, reschedule-out, is just as useful: when demand moves later, push the order out and keep the cash. How MRP produces these messages is explained in MRP explained.

2. The stock is in the wrong place: transfer it

The second plant, or the service warehouse, has 60 of the same bearing. A transfer takes a day. It is faster than any purchase, and the other site gets its stock back when Friday's delivery arrives.

3. The stock is reserved for a later order: borrow it

There are 50 bearings on the shelf, all reserved for an order that assembles next Tuesday. Take 40 for Thursday and let Friday's delivery refill the Tuesday order. This is safe only if someone checks that Friday's delivery really lands before Tuesday. Otherwise you haven't solved the shortage, you have moved it to a different customer.

4. There is an approved alternative: substitute

If engineering has approved a second bearing for this product, check its stock. The key word is approved. A part that looks the same on the drawing is not an alternative until someone with the authority says so, and the substitution is recorded so you know which bearing went into which unit.

5. The schedule can move: resequence

Swap Thursday's assembly with Friday's, if Friday's job has all its parts. The customer for Thursday's order gets it one day later, or still on time if there was slack. Resequencing costs nothing to buy, but check the changeover and the other materials of the job you pull forward.

6. The shortage isn't real: fix the data

Before calling anyone, walk to the receiving dock. A surprising share of shortages are bookkeeping: a delivery that arrived yesterday and wasn't received, a count that was never corrected, or a BOM that lists two bearings where the product uses one. Material that was received but sits on quality hold is a different case. It is real, but it isn't usable yet, as described in raw material inspection.

Think of cooking dinner and finding no eggs. You don't order a grocery delivery for tomorrow. You borrow from a neighbor, use something else, or cook tomorrow's dish tonight. The six options above are the factory version of the same instinct.

Manufacturing procurement: requested vs confirmed date

Every purchase order carries two dates, and mixing them up creates hidden shortages. The requested date is what you asked for. The confirmed date is what the supplier promised. In our example the PO was created with a requested date of Wednesday. The supplier confirmed Friday by email two weeks ago, and nobody updated the order. So MRP planned with Wednesday and showed no problem until someone typed in the new date on Tuesday. The red line appeared with two days' warning instead of two weeks.

The rule is simple: plan only on confirmed dates, and treat an unconfirmed order as a risk, not as supply.

Myth: "The cheapest supplier is the best buy"

A buyer switched bearings to a supplier that was $0.20 cheaper per piece. At 3,000 bearings a year, that saves $600. The new supplier's lead time is longer and less reliable, and in the first year one late delivery needed air freight: $800. The first year ends at −$200, and that is before counting two hours of a stopped assembly line.

Unit price is the easiest number to measure, so it gets measured. Total cost includes expediting, extra safety stock to cover an unreliable lead time, and the line time lost when the part is late. How small supply delays grow as they travel upstream is covered in supply chain management for manufacturers.

How factory.online shows the choice

In factory.online, the bearing shortage is linked to the Thursday assembly order that created it. The planner sees the open purchase order with its date, stock by location, and the reserved stock with the orders it belongs to, all in one place. From there it is quicker to see which of the six options exists before anyone reaches for a new PO.

If your buyers spend their mornings working through shortage lists line by line, book a demo and bring one of those lists with you.