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What Is a 3PL SLA?

A service level agreement turns a sales promise into something you can measure.

Promises, Written Down and Measured

An SLA, or service level agreement, is the part of a 3PL contract that sets measurable targets: how accurately orders ship, how fast inventory is received, whether orders make the cutoff, and how accurate inventory counts are. It also says what happens when a target is missed.

    The standard clauses:

  • Order accuracy

    The right items, sizes and quantities in each order.
  • Receiving turnaround

    How fast inbound inventory is counted and available to sell.
  • Shipping cutoff performance

    Whether orders that make the cutoff ship the same day.
  • Inventory accuracy

    Whether the system count matches the shelf.
  • Remedies

    What happens financially when a target is missed.

How Each Measure Works

MeasureWhat it tracksQuestion to ask
Order accuracyOrders shipped with no wrong or missing itemsHow is an error counted, and who reports it?
Receiving turnaroundTime from inbound arrival to stock availableDoes the clock start at dock arrival or appointment?
Ship on timeOrders that make the cutoff and ship that dayDoes the clock start at order import or label creation?
Inventory accuracySystem counts that match physical countsHow often are cycle counts done, and on what?
Response timeHow fast your requests are acknowledgedAcknowledged by whom, and how?

The definitions matter as much as the numbers. A target that is measured from the wrong starting point can look good on paper while your customers wait.

Remedies and Reporting

A target with no measurement or consequence is a hope, not a clause.

Ask whether service credits exist when a target is missed, how performance is measured, and how often it is reported. Ask to see a sample report before you sign.

OC3PL provides weekly performance reporting covering service levels, shipping costs and inventory status, sent by your account manager. Retail and wholesale clients get a fulfillment and service-level review in that weekly reporting so compliance issues surface early.

What Apparel Brands Should Add

A generic SLA was written for generic products. Apparel has a few needs worth putting in writing:

  • Returns processing time: how quickly returned items are inspected and restocked. Returns are processed and logged within 48 hours of receipt, and many are handled the same day. Each item is inspected and restocked, discarded or donated by the rules you set.
  • Drop readiness: how much notice the warehouse needs to staff a drop, and what it commits to once notified.
  • Packing instructions: a commitment to follow your folding, bagging and insert instructions.
  • Variant accuracy: that size and color are scanned at the pick, not just the style.
  • Escalation: who you call when something is urgent, and whether they are on site.

See what an apparel brand should put in a 3PL service agreement for a fuller list.

A Simple SLA Outline

What a clear agreement usually covers, section by section.

SectionWhat it should say
ScopeWhich services are covered: receiving, storage, pick and pack, shipping, returns, kitting
DefinitionsWhat counts as an error, as shipped, as received and as a business day
TargetsThe measures and the level the 3PL commits to for each
MeasurementHow each measure is calculated and from what data
ReportingWhat report you get, how often, and from whom
RemediesWhat happens when a target is missed, including any service credits
Your sideWhat you commit to: forecasts, labeled inbound, advance shipping notices
ReviewWhen targets are reviewed as your volume changes

The "your side" section matters. A 3PL can only hit receiving targets if inbound arrives labeled and with an advance shipping notice, and can only staff a drop it knows about. A fair agreement names both sides.

SLAs and communication

Numbers on paper do not help in the middle of a problem. What helps is a person who answers and can see the floor. Ask any 3PL who handles an issue when a target is at risk, and where that person works.

Reading an SLA Before You Sign

  1. List the five measures that matter most to your business.
  2. Check that each one has a clear definition and a starting point for the clock.
  3. Ask how each one is reported and how often.
  4. Ask what happens when a target is missed.
  5. Ask who you call when it is missed, and how fast they respond.

At OC3PL: All client requests are acknowledged within two hours, and support is never outsourced. Your account manager works on site. More questions to ask in the apparel 3PL checklist and how to compare new 3PLs.

Common Questions

A service level agreement: the part of a 3PL contract that sets measurable targets for things like order accuracy, receiving speed and on-time shipping, and says what happens if a target is missed.

Order accuracy, receiving turnaround, shipping cutoff performance, inventory accuracy, how each is measured and reported, and the remedy when a target is missed.

Financial credits a 3PL gives you when it misses an agreed target. Ask whether they exist and how they are calculated.

It depends on the contract. Ask whether the clock starts at order import or at label creation, and what counts as shipped.

Returns processing time, drop readiness, packing instructions, variant-level accuracy and a clear escalation path.

Weekly, through your account manager, covering service levels, shipping costs and inventory status.

Usually forecasts, labeled inbound shipments and advance shipping notices. A 3PL cannot hit receiving or drop targets without them.

Review them as your volume and channels change. A brand adding wholesale, for example, needs retail compliance measures it did not need before.

Related Reading

More detail, in OC3PL’s own guides.

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