Amazon already hands DSP owners a scorecard, but scaling a DSP successfully means watching a broader set of metrics than what shows up in that weekly report. The owners who grow past their first station are the ones tracking operational, financial, and workforce metrics together — because in this business, they’re all connected.
On-Time Delivery and Completion Rate
This is the metric Amazon cares about most — it’s the clearest signal of whether your operation is running well. Track it not just at the fleet level but by route and by shift, so you can spot patterns before they drag down your overall scorecard.
Cost Per Stop and Cost Per Route
Understanding your true cost per stop — factoring in driver pay, vehicle costs, fuel, and overhead — tells you whether your operation is actually profitable at scale, not just busy. Many DSP owners focus on completing routes without a clear view of what each one actually costs to run, which makes it hard to know which routes or shifts are worth expanding into.
Delivery Associate Turnover Rate
Turnover is one of the most expensive, least visible costs in the DSP business. Every departure means recruiting, training, and a period of lower productivity and higher error rates from the replacement. Track turnover by tenure band (first 30 days, 90 days, six months) to identify where you’re losing people — often it’s early, which points to onboarding or expectation-setting problems rather than pay.
Industry-wide, DSP turnover often runs well over 100% a year, with average driver tenure hovering around just 90 days — and replacing a driver costs $1,500 or more once you factor in background checks, drug testing, job-board spend, and paid training. Recruiting teams stuck on manual screening commonly burn 20+ hours a week just to keep pace, which is exactly the hidden cost this metric is meant to expose.
Nokia Crane, who’s run her own Amazon DSP for about six years, points to staffing rhythm as much as pay when she talks about why some DSPs bleed drivers faster than others. Her biggest early mistake, she’s said, was hiring too many people too late ahead of one peak season — a scramble she now avoids by hiring continuously through the year rather than treating recruiting as a seasonal on-off switch:
“I just continue to hire throughout the year because you have different drivers, different weather… you just have to find your medium range of who to hire.”
Safety Incidents and Driving Score Trends
Amazon tracks this closely, but you should track it even more granularly — by driver, by route, by time of day — to catch coaching opportunities before they become scorecard problems. A rising trend in harsh braking or speeding events, even without an accident yet, is an early warning sign worth acting on.
Time to Fill Open Routes
How long does it take you to go from an open delivery associate position to a trained, badged driver on the road? This metric directly affects your ability to say yes to additional routes and to recover quickly from unexpected attrition. Slow time-to-fill often points to a hiring process that’s too manual to keep pace with the business — which is exactly the gap last mile delivery hiring software is designed to close, by automating sourcing, screening, and scheduling so open positions get filled in days, not weeks. HappyFleet gives DSP owners visibility into hiring speed alongside their other operational metrics, so staffing doesn’t become the hidden bottleneck to growth.
Customer Feedback and Complaint Rate
Many of the complaints tied to driver conduct or delivery quality trace back to staffing gaps in disguise, which is another reason owners track hiring metrics inside the same dashboard as customer feedback in tools like HappyFleet. Beyond Amazon’s own customer feedback metric, track the nature of complaints — package handling, driver behavior, missed delivery windows — so you can address root causes rather than treating every complaint as an isolated incident. Patterns here often trace back to specific routes, shifts, or newer drivers who need additional coaching.
Bringing It Together
No single metric tells the full story. A DSP with great on-time rates but high turnover is masking a staffing problem that will eventually catch up to its scorecard. One with low turnover but high cost per stop may be overstaffed or inefficient on routing. Review these metrics together, monthly at minimum, and use them to guide where you invest.
Vehicle Utilization and Fleet Efficiency
Beyond people-related metrics, track how efficiently you’re using your leased fleet — vehicles sitting idle represent a fixed cost with no offsetting revenue. Compare actual routes run per vehicle against your fleet size regularly, especially as you weigh adding vehicles versus absorbing new routes with underutilized ones. This is also a useful cross-check against staffing: a fleet running below capacity because you don’t have enough drivers to fill every van is a staffing problem wearing a fleet-utilization disguise.
Applicant-to-Hire Conversion Rate
Beyond simply tracking time to fill, look at how many applicants it takes to produce one successful hire who stays past 90 days. A low conversion rate often points to a screening process that isn’t filtering effectively, or a job posting that’s attracting the wrong candidates in the first place. Improving this ratio — through better screening questions or clearer expectations in your job postings — reduces the overall burden on your hiring pipeline and improves the quality of drivers reaching your road.
Rafael Garcia’s Gallo Logistics saw what a real improvement in this metric looks like: after automating screening, their second-round interview show rate jumped roughly 5x, from 10–15% up to 76%, while screening 50 candidates dropped from more than 25 hours down to about one — ultimately producing 12 qualified hires at a 75% hire rate from a single job posting.
Setting a Cadence for Reviewing Your Numbers
Metrics only drive better decisions if you actually look at them on a consistent schedule, rather than pulling reports only when something has already gone wrong. Set a fixed weekly review for operational metrics like on-time rate and safety incidents, and a monthly review for financial and workforce trends like cost per stop and turnover. This cadence turns your metrics into an early warning system instead of a post-mortem tool you only consult after a bad quarter.
Scaling a DSP is ultimately a numbers discipline. Owners who build the habit of reviewing operational, financial, and workforce metrics side by side are the ones who catch problems early and make confident decisions about when to grow.
Turn Your Hardest Metric Into Your Strongest One
Turnover and time-to-fill don’t have to stay your two worst numbers — HappyFleet’s AI Recruiter screens every applicant within minutes and keeps qualified candidates moving into your pipeline continuously, so staffing stops dragging down your scorecard. Run the numbers on your own operation with the ROI calculator.