PTCB Supply Chain common mistakes
PTCB Supply Chain · Understand the traps and how to avoid them.
Approving a supplier invoice for payment as soon as it arrives, using only the purchase order as the cross-check and never comparing the billed quantity to the actual received quantity.
The invoice looks like the authoritative document and candidates assume a supplier would only bill for what was delivered; the exam's short-shipment and price-variance items punish this assumption.
What to do instead
Apply the three-way match every time: PO (authorized quantity and price) vs. receiving report (quantity and condition actually accepted) vs. invoice (amount billed). Any variance - short shipment, substitution, pack-size change, price increase - is resolved with the supplier before payment; you pay for what you accepted, not for what was ordered.
Ordering Schedule II drugs with an ordinary purchase order or requisition and treating the supplier invoice as sufficient ordering authority, the same way Schedule III–V items are handled.
All schedules arrive on the same truck and generate similar-looking paperwork, so candidates blank on which schedules require a distinct ordering instrument.
What to do instead
Anchor it: Schedule II requires DEA Form 222 (or CSOS electronic equivalent), with the specific supplier and item/package counts, and no substitutions or line changes are allowed. Schedules III–V are ordered on ordinary invoices/POs that carry the pharmacy's DEA number. Both sets of records are retained and filed separately from purchase orders.
Using par level, reorder point, and maximum interchangeably, so the correct answer on a min/max or replenishment question gets chosen by whichever number appears 'in the middle.'
All three are numbers printed on the same shelf tag or inventory screen, and the exam deliberately supplies values that are plausible for more than one definition.
What to do instead
Separate the functions: reorder point (minimum) = expected demand during lead time plus safety stock, and it triggers the order; par level = the target on-hand quantity you want after the order lands; maximum = the ceiling the min/max system will not exceed. When a question asks 'when do you order,' the answer is always the reorder point, never the par level.
Rotating stock strictly first-in, first-out even when the incoming product has a later expiration date, and shelving new stock in front of older stock.
FIFO is the phrase candidates learn first and it feels universally correct, so expiration date gets ignored as a tiebreaker.
What to do instead
Use FEFO for any expiration-dated product: the earliest expiration date goes out first, regardless of arrival order. FIFO applies only to non-dated supplies. At put-away, new stock goes behind or above existing stock, and short-dated product is flagged and pulled forward for use or return before it expires.
Leaving an expired or short-dated item on the active dispensing shelf with a sticker or note on it, while leaving the on-hand quantity unchanged in the inventory system.
Pulling product feels like a task that can be deferred, and candidates underestimate that the inventory record - not the physical bottle - is what drives reordering and reporting.
What to do instead
Expired and short-dated stock is physically segregated in a labeled 'Do Not Dispense' or quarantine location, removed from sellable on-hand in the system with an adjustment, and logged with NDC, lot, quantity, and date. From there it goes to supplier return for credit, reverse distributor, or destruction per policy - never back to the shelf.
Signing the delivery receipt as 'received in good order' before counting the cartons against the packing slip, then discovering a shortage or crushed case later and trying to file a claim.
Drivers are waiting, the delivery looks complete, and candidates do not realize that an unqualified signature is the evidence the supplier will use to deny the claim.
What to do instead
Count and inspect before signing. Note every shortage, overage, damage, or substitution directly on the delivery receipt and the pharmacy's copy, photograph damaged cases, keep the signed exception copy, and notify the supplier inside its claim window. A clean signature transfers the loss to the pharmacy.
Accepting a refrigerated or frozen shipment without reading the temperature indicator or data logger before signing, and then putting the product into the refrigerator.
Candidates focus on quantity and NDC because those are the visible checks, and the excursion is only discovered days later when the logger is reviewed.
What to do instead
Temperature verification is the first check on a cold-chain delivery, before the signature. Read and record the indicator/logger value, document the time and the product's temperature on the receiving record, and if there is an excursion, segregate the product in quarantine and contact the supplier for disposition. Excursion-affected stock is never returned to the shelf on your own authority.
Responding to a recall by pulling only the visible shelf stock of the recalled lot, without searching receiving and dispensing records, without quarantining what was already pulled, and without documenting the response.
The recall notice names a lot and a product, so the visible bottle seems like the whole answer; the exam tests the effectiveness check, not the shelf pull.
What to do instead
Work the full sequence: identify every location of the NDC/lot from receiving and dispensing records, retrieve and quarantine all quantities including patient-returned stock, document quantity on hand and quantity recovered, notify patients/prescribers when the class requires it, and return the signed recall response to the supplier and file it. Recall classes anchor the urgency: Class I = reasonable probability of serious adverse health consequences or death; Class II = temporary or medically reversible harm, or remote probability of serious harm; Class III = unlikely to cause harm. A minor market withdrawal is not a recall and does not get the same handling.
Applying a single remembered retention period to every record class, typically citing two or three years for DSCSA transaction information or citing the DSCSA period for DEA records.
Retention numbers are unglamorous and easy to blur, and the exam pairs them in the same question to see whether the candidate has an anchor.
What to do instead
Hold three anchors: DEA required records (receipts, distribution, Form 222/CSOS, inventory) = 2 years; DSCSA transaction information/statement and recall records = 6 years; prescription records = per state law, commonly 2 years but check the state. The 6-year figure belongs only to the DSCSA transaction trail.
Using 'suspect' and 'illegitimate' as synonyms, so a question describing product that merely looks counterfeit is answered with an immediate FDA notification instead of quarantine and investigation.
Both words sound like 'bad product' and the notification timeline gets attached to the wrong stage.
What to do instead
Separate the stages: suspect product (reason to believe it is counterfeit, diverted, stolen, adulterated, or otherwise illegitimate) is quarantined, not dispensed, and investigated by verifying with the trading partner and transaction information. Only after investigation confirms the product is illegitimate does the notification obligation arise - notify FDA and immediate trading partners within 24 hours and keep the documentation of both the determination and the notification.