How do you calculate diagnostic labor cost?

Multiply RMA units diagnosed by the per-unit labor cost and the percentage needing full diagnostics, then add fixed setup. For 100 units at $45 each, 80% requiring full diagnostics, plus $250 setup, the total is $3,850.

What does units requiring full diagnostics mean?

It is the share of incoming RMA units that need complete bench testing rather than a quick screen. At 80%, only four in five units consume the full per-unit labor cost, which lowers the variable total accordingly.

What is a good diagnostic cost per RMA unit?

It depends on product complexity, but here the blended diagnostic labor cost per RMA unit is $38.50 once the fixed setup is spread across all 100 units. Benchmark against your own bench throughput rather than a universal target.

Why include a fixed diagnostic setup cost?

Standing up the bench — loading test fixtures, calibrating equipment, configuring software — costs the same whether you run 50 or 500 units. The $250 setup captures that one-time cost per batch.

Variable diagnostic labor vs total diagnostic labor cost?

The variable labor ($3,600 here) scales with unit count and diagnostic rate. The total ($3,850) adds the fixed $250 setup — that is the full cost to budget or charge back.

How can I lower diagnostic labor cost?

Cut the percentage of units needing full diagnostics with an upfront fast-screen, or reduce per-unit labor through better test automation. Dropping the full-diagnostic rate from 80% to 60% would reduce variable labor to $2,700 on the same batch.

Electronics Repair, Refurbishment & Depot Operations calculator

Diagnostic Labor Cost Calculator

Diagnostic labor cost is the total dollar spend a depot incurs to fault-find returned electronics before any repair begins. Depot managers and reverse-logistics planners use it to price RMA intake, set per-unit chargebacks to OEM clients, and decide whether triage screening is paying for itself. In electronics refurbishment, diagnostics is often the most labor-intensive step — a tech bench-testing a returned board can spend more time finding the fault than fixing it — so getting this number right drives the whole repair economics. This calculator splits the variable per-unit diagnostic labor from the fixed setup cost of standing up the diagnostic bench.

What this calculator does

Estimate diagnostic bench labor cost for returned electronics, circuit boards, power supplies, displays, modules, or industrial controls before a repair quote or warranty decision.
Use it when diagnostic labor cost in electronics repair, refurbishment and depot operations is being put through a electronics repair, refurbishment and depot operations weighted-cost review.
It computes the total diagnostic labor cost across an RMA batch by scaling per-unit labor by the share of units needing full diagnostics and adding a fixed setup cost.

Formula used

Variable diagnostic labor cost = RMA units diagnosed × diagnostic labor cost per unit × units requiring full diagnostics
Total diagnostic labor cost = variable diagnostic labor cost + fixed diagnostic setup cost

Inputs explained

RMA units diagnosed:
Diagnostic labor cost per unit:
Units requiring full diagnostics:
Fixed diagnostic setup cost:

How to use the result

Use it when quoting a depot diagnostics contract, costing an RMA batch, or evaluating whether a fast-screen step reduces the units routed to full diagnostics.
It assumes a single average labor cost per unit; complex multi-fault units or no-fault-found returns will diverge from the modeled average.

Current U.S. benchmarks

The producer price index for copper and brass mill shapes stands at 559.593 (BLS, May 2026), up 76.8% from a year earlier. Quotes priced off last quarter's material cost miss this move. Global copper trades at $13,484 per tonne (IMF via FRED, May 2026).
U.S. manufacturing runs at 75.6% of capacity (Federal Reserve, May 2026). New factory orders are up 2.3% year over year (Census).
The U.S. has 11,261 computer and electronic products establishments employing about 815,443 workers (Census County Business Patterns, 2023).

Common questions

How do you calculate diagnostic labor cost? Multiply RMA units diagnosed by the per-unit labor cost and the percentage needing full diagnostics, then add fixed setup. For 100 units at $45 each, 80% requiring full diagnostics, plus $250 setup, the total is $3,850.
What does units requiring full diagnostics mean? It is the share of incoming RMA units that need complete bench testing rather than a quick screen. At 80%, only four in five units consume the full per-unit labor cost, which lowers the variable total accordingly.
What is a good diagnostic cost per RMA unit? It depends on product complexity, but here the blended diagnostic labor cost per RMA unit is $38.50 once the fixed setup is spread across all 100 units. Benchmark against your own bench throughput rather than a universal target.
Why include a fixed diagnostic setup cost? Standing up the bench — loading test fixtures, calibrating equipment, configuring software — costs the same whether you run 50 or 500 units. The $250 setup captures that one-time cost per batch.
Variable diagnostic labor vs total diagnostic labor cost? The variable labor ($3,600 here) scales with unit count and diagnostic rate. The total ($3,850) adds the fixed $250 setup — that is the full cost to budget or charge back.

Last reviewed 2026-05-12.