Repair KPIs

Electronics Repair Depot KPIs and Benchmarks: Yield, NFF, Lead Time and TAT Targets

Target ranges for the KPIs that matter in electronics depot operations, world-class versus typical, plus the specific levers that move each metric.

First-pass repair yield is the headline KPI. Typical depots run 78 to 86 percent, competent operations hit 88 to 92 percent, and world-class board-level shops reach 93 to 96 percent. Below 80 percent, second passes eat capacity and every other metric degrades. Measure it weekly per product family, not blended, because a single low-yield model can hide inside a healthy average. The lever that moves it fastest is diagnostic accuracy: pushing more failures to correct root cause on the first bench visit, tracked through the First-Pass Repair Yield calculator against a rolling four-week baseline.

No-fault-found rate is the KPI most operations underestimate. Typical NFF sits at 8 to 15 percent, good depots hold 5 to 8 percent, and best-in-class screening keeps it under 5 percent. High NFF means you are burning diagnostic labor on units with no reproducible defect, often because test coverage or soak duration is too shallow. The improvement lever is a standardized, time-boxed screen and better field return criteria upstream. Track the trend with the No-Fault-Found Rate calculator, and watch for NFF that spikes right after a new product launch, a classic sign of premature returns.

Turnaround time, or TAT, is what customers actually feel. Consumer electronics depots target 3 to 5 business days end to end, industrial and medical often allow 7 to 15 days given burn-in requirements, and world-class flow keeps queue wait under one day. The insight from the RMA Queue Lead Time calculator is that 50 to 70 percent of TAT is usually idle queue, not touch time. The lever is WIP control: cap units on the floor, and TAT drops without adding a single technician, because Little's Law rewards lower queue over faster hands.

Repeat repair rate, sometimes called re-return or bounce rate, measures durable quality. Typical is 6 to 10 percent within 90 days, strong depots hold 3 to 5 percent, and world-class stays under 3 percent. Every repeat is a full second cost with negative customer trust attached. Measure it against ship date cohorts, not calendar month, so you catch a bad batch cleanly. The lever is verification rigor, extending burn-in dwell or adding functional coverage on high-bounce models, even at a small throughput cost, since one avoided bounce pays for many extra soak hours.

Burn-in utilization tells you whether expensive chambers earn their keep. Typical utilization runs 45 to 65 percent, well-run depots hit 70 to 85 percent, and pushing past 90 percent risks queue backup ahead of the chamber. Utilization equals occupied slot-hours divided by available slot-hours, benchmarked with the Burn-In Test Capacity calculator. Low utilization usually means load and unload scheduling, not slot count, is the constraint. The lever is staggered load windows and batching by dwell time so chambers are rarely half-empty overnight, which is when fixed cost per unit quietly doubles.

Technician productive yield per shift ties labor to output. A benchmark board tech completes 12 to 20 repaired units per 8-hour shift on mixed work, or 30 to 50 on simple reseat and reflash tasks. World-class operations track productive touch time above 75 percent of paid time, versus a typical 55 to 65 percent lost to material chasing and documentation. The lever is kitting and staging: pre-picked parts and a clean RMA record can add 10 to 15 productive points per technician without any change to actual repair skill or headcount.

Cost per repaired unit is the KPI that aggregates the rest, and it should be trended, not just quoted. A depot moving first-pass yield from 84 to 90 percent, NFF from 12 to 7 percent, and burn-in utilization from 55 to 78 percent will typically cut cost per repaired unit by 12 to 20 percent without touching wage rates. Watch the Cost Per Repaired Unit calculator monthly against your own baseline rather than an external number, since product mix makes cross-company comparison unreliable. The real benchmark is your own trend line bending down while yield and TAT hold or improve.

Prioritize the levers by leverage, not by ease. In most depots the ranking is: cut queue WIP to fix TAT, tighten the diagnostic screen to fix NFF and first-pass yield together, then extend verification to fix repeat rate, then schedule chambers to lift utilization. Set a single north-star target per quarter, for example first-pass yield above 90 percent, and hold the others as guardrails so you do not improve one KPI by quietly wrecking another. A balanced scorecard of five metrics beats chasing any one number to a local optimum that costs you elsewhere.

Published 2026-07-01.