In parcel shipping, a single “forever” carrier isn’t a safety net; it’s a bottleneck. In extreme situations, it’s a liability.  Volumes rise, surcharges shift, and customer promises don’t budge.  

Market shifts; customer shifts.  How can you not?

The durable play is policy, not panic: a rules-driven, multi-carrier parcel strategy that protects both cost and delivery commitments, especially when conditions change hour to hour.

With peak volume set to hit 2.3B parcels (+5% YoY) this holiday, the only durable way to protect cost and promise dates is by curating a bench that flexes when the network doesn’t – or can’t.

The Case for a Flexible Parcel Strategy

Parcel networks are living systems: capacity swings, lane performance drifts, and GRIs compound quietly until margin disappears. If your plan assumes one carrier can be all things, you’ll overpay when rates rise and underperform when service wobbles. 

A flexible, multi-carrier position gives you options before you need them:

• Multi-carrier optionality balances cost, speed, and promise by region, weight, and cutoff—keeping LTL as a rare exception (DIM/oversize only).
• Rates do not stand still.  Both UPS and FedEx raised 2025 base rates by an average of 5.9%, making multi-carrier rate shopping a direct lever on landed cost.  Active rate-shopping and policy routing turn unpredictable costs into managed choices. 
• Speed is a loyalty lever; optionality helps you hit two-day expectations across zones without throwing money at air.

The point isn’t to add carriers for sport—it’s to insulate your promises from volatility. A flexible bench buys you time and control, so your team can respond with policy, not panic.

Designing Your Parcel Bench (North America Focus)

You don’t need to rebuild your stack to get multi-carrier right. Start with the lanes you already run, the promises you already make, and the exceptions that trip you up. Then add targeted coverage where it moves the needle most.

GLS notes that shipments that take 3–4 days with national carriers will often be delivered in 1–2 days with GLS, depending on the shipping location.  GLS broadly serves the western US, enabling broader 1–2-day reach from West Coast origins.

Take a methodical approach to reviewing, then adjusting, your strategy:

1. Portfolio review. Map lanes by zone/weight and flag single points of failure. Add regional/specialist last-mile where they’re strongest.
2. Promises to tiers. Define Economy (3–5d), Standard (2–3d), Expedited (1–2d), and Returns. Reserve LTL for true oversize/exception paths.
3. Automated rate-shopping + policy routing. “Route to lowest landed cost that meets the promise,” with guardrails for performance, DIM risk, and cutoffs.
4. Pilot → measure → repeat. Treat carriers as interchangeable modules. Keep what hits thresholds; pause what doesn’t.

This is less a tech project and more an operating rhythm. Continuous improvement should not be downplayed here.  Set and forget got you here; don’t be lulled into doing it again.  A clear tier map and a few enforceable rules turn your carrier list into a real bench—one that gets better every week.

Make the Bench Tangible: Roles × Tiers

Teams move faster when they can “see” the plan. A simple roles-by-tier matrix removes guesswork at the station and makes policy decisions obvious in the WMS/OMS.

Regional / Specialist Examples

• CDL: Reaches over 50 million consumers across the Northeast-to-Mid-Atlantic and provides overnight delivery in NY, NJ, CT, PA, DE, DC, MD, VA—often with lower pricing than national carriers.
• UniUni: Cross-border U.S. / Canada + last-mile; useful for cost-competitive light parcels headed to CA with tighter control over handoffs.

When the matrix is visible and rules are explicit, planners stop debating hypotheticals. The system routes the routine; humans focus on exceptions that actually need judgment.

From Bottleneck to Balanced SLAs (Why it Pays Off)

Optionality only matters if it shows up in your numbers – ideally, in your company’s bank account. These four KPIs translate strategy into outcomes you can hold the network—and yourselves—accountable to.

1. Blended Cost Per Parcel (BCPP).
   Watch total parcel spend divided by parcels shipped, weekly. If it rises ≥5% week-over-week without a clear mix shift, expand regional share where SLAs allow and re-shop DIM-sensitive SKUs.  This is your margin early-warning system; it tells you when policy needs to step in before finance does.
   
2. Promise Hit Rate (By Zone & Method).
   Track the percentage of orders that meet their promised date, segmented by zone/tier. Hold Zones 2–4 at ≥95%; if a carrier misses the threshold for two consecutive weeks, auto-failover per policy.  Promised Hit Rate is your brand in a number; protect it with guardrails you rigorously enforce.
   
3. Failover Success Rate.
   Of orders that triggered a policy failover, what percentage still arrived on time and on budget? Target ≥97%; if it dips, retune backups, cutoffs, or packing times.  Failover only counts if it saves the promise, not just the shipment.
   
4. DIM/Surcharge Rate.
   Monitor the share of parcels incurring DIM/accessorials and the $/parcel impact. Trigger “DIM defense” to re-shop methods when projected surcharges exceed your threshold.  Surcharges are where quiet leakage lives; making them visible makes them manageable.
   

Finally, 86% of consumers define “fast delivery” as two days or less, and 63% will switch retailers if they can’t get it. Redundant carriers help you hit those promises.  Ensure that all the hard policy work reaches the customer’s front and center attention. Often, your fulfillment execution is just as powerful for capturing and retaining customers as the product or service you are delivering.

World-Class Execution Calls For Strong Technology Partners

Good policy needs good plumbing.

eHub centralizes carrier connections and live quotes.  They give you access to options that you didn’t consider and manage those connections, eliminating technical lift while defending your margins. 

Deposco executes your new rules with order, promise, and inventory context—so routing stays accurate at ship time and auditable at close.  Dynamic rate shopping and systemic support ensure predictable execution.  Every package optimized, every time.

Clear rules and a supply chain execution system that can follow them turn your strategy into muscle memory: repeatable, observable, and easy to iterate and improve.

Parcel Optionality = Resilience

When a national carrier surges, a lane slips, or demand spikes north of the border, single-threaded networks stall. A multi-carrier bench stays on-promise and on-budget by design.  You don’t have the time to reconfigure your network every shock, you need the confidence that your response flexes automatically.

The U.S. parcel market is projected to grow 36% by 2030, so the ability to scale across multiple carriers isn’t optional—it’s how you keep pace.

You’re not guessing. You’re executing.

With eHub curating your carrier bench and Deposco enforcing optimal fulfillment locations and modes, your playbook truly is policy, not panic.