Piedmont Warehousing & Manufacturing Support: A woman-owned, full-service warehousing and manufacturing support company exceeding expectations since 1975
Amazon charges an aged inventory cost every month on units stored longer than 181 days. It bills storage on the daily average cubic footage your inventory occupies. Restock limits cap how much you can send in at all. All three rules sit on Amazon’s own FBA program page.
The same page frames third-party logistics as a step sellers take as they scale, suggesting the move once volume passes roughly ten orders a day. Those mechanics decide what a prep center has to do for you. A provider that treats prep as bagging and labeling hands you a clean shipment. It also hands you a storage bill you did not plan for.
Onboarding is where that gets settled, and most sellers rush it. Selection comes first, and choosing an Amazon prep center deserves its own process.
Week one: specification, not pricing
Pricing was settled before you signed. Week one is for writing down what “prepped” means for your catalog.
Go SKU by SKU. Which items need a poly bag. Note the ones requiring a suffocation warning. Flag anything that ships in its own packaging, carries a multipack label, or shows an expiration date. A prep center cannot infer any of that from a spreadsheet of ASINs.
Send physical samples where the answer is ambiguous. A photo is a poor guide to whether a product needs bubble wrap. That disagreement is cheaper to settle now than after 2,000 units ship.
Week one: the data connection
Decide how inventory information moves before freight does. Some sellers work inside the provider’s system. Others integrate their own warehouse management system and keep a single source of truth across channels.
Either path works. What matters is that receipts, counts, and outbound shipments show up somewhere you can see them without emailing a warehouse. Sort out user accounts, reporting formats, and who gets the discrepancy notice.
Week two: the first receipt
Route one real inbound shipment and watch every step. Confirm the carton count matches the packing list. Open cartons and check unit counts against the supplier invoice. Then verify the prep applied matches the specification you wrote in week one.
Ask for photos at three points: freight on arrival, a finished unit, and the loaded outbound pallet. Those three images resolve most future disputes in a single email.
Week three: turnaround and the storage clock
Measure receiving-to-outbound in business days, and hold the provider to a number rather than a feeling. That figure feeds the 181-day clock and your restock planning. Inventory sitting at a prep center earns nothing.
Set the standing schedule now. Sellers with steady replenishment usually do better on a fixed weekly outbound day. A predictable cadence lets the provider batch work. It also gives you something to plan reorders against.
Week four: exceptions and quality
Exceptions are the real test. Write down what happens when a supplier ships short. Do the same for a crushed carton, a rejected shipment, and a return needing rework before it goes back into stock.
Ask how the provider controls quality rather than whether it promises quality. Documented procedures, trained staff, and outside audits are the difference between a process and an intention.
That distinction is getting attention this month. ISO published a sixth edition of its quality management standard, ISO 9001. It replaces ISO 9001:2015 as of September 16, 2026. Organizations holding a current certificate transition on a timeline set by their certification body. Ask a provider which edition it is certified to, and where it sits in that transition.
Sellers who find the exception handling weak at this stage should revisit whether in-house prep or an outsourced provider fits their volume pattern.
What good onboarding produces
Four weeks in, you should hold a written prep specification for every SKU. Add a working data connection, a measured turnaround time, and an exception procedure. One real shipment should already be done and inspected.
Sellers who skip these steps find the gaps in October. October is the worst month to find anything.
Piedmont Warehousing: Amazon Prep and Quality Analysis in Spartanburg
Piedmont Warehousing & Manufacturing Support is a woman-owned, ISO 9001:2015 certified 3PL in Spartanburg, South Carolina, serving the Upstate since 1975. Warehousing, fulfillment, and light manufacturing run under one roof on the I-85 corridor.
Our Services Include:
- Amazon Prep Services — FNSKU labeling, poly bagging, bubble wrapping, and inbound shipment preparation
- Quality Inspection Services — Inspection and quality checks built into the receiving and prep workflow
Onboarding a prep partner before Q4?
Contact Piedmont Warehousing to talk through volume, SKUs, and timing.
About the Author
Ada Wallace is President of Piedmont Storage and Repack, LLC, operating as Piedmont Warehousing & Manufacturing Support in Spartanburg, South Carolina. She brings more than 24 years in the warehousing and manufacturing support industries and leads the second generation of Wallace family ownership of a business founded in 1975. Under her leadership, Piedmont holds ISO 9001:2015 certification and Women’s Business Enterprise (WBE) designation, serving clients across Spartanburg, Greenville, Anderson, Cherokee, Laurens, and Union counties. She can be reached at awallace@piedmontwarehousing.com.
Works Cited
Amazon. “Amazon FBA: Fulfillment Services for Your Ecommerce Business.” Sell on Amazon, Amazon.com Services LLC, accessed 12 Sept. 2026, sell.amazon.com/fulfillment-by-amazon.
International Organization for Standardization. “ISO 9001: Quality Management Systems — Requirements.” ISO, 2026, www.iso.org/standard/9001.
This article is general industry information and is not a substitute for current FDA guidance, Amazon’s published seller policies, or professional compliance advice for your specific products.