Repair Tech Parts Inventory Math: ROI of the First-Time-Fix

First-Time-Fix Rate (FTFR) Benchmarks

In the appliance repair industry, FTFR is the single most important metric for operational efficiency. While the industry average hovers around 75% (Aberdeen Group), "best-in-class" organizations consistently achieve 85–90%. The difference isn't just skill; it's preparation.

A lower FTFR means more truck rolls, higher fuel costs, and frustrated customers. Most importantly, it means lost revenue from potential new jobs while techs are doing "no-charge" callbacks or part-install return visits.

The Math: Inventory vs. Callbacks

Every repeat visit (truck roll) costs an average of $200–$300 in labor, fuel, and overhead. If a shop handles 100 jobs a month with a 75% FTFR, they are making 25 return visits per month. At $250 per roll, that's $6,250 in "lost" capital every month.

By investing ~$1,200 in high-probability truck stock, you can lift that FTFR to 85%. This reduces return visits to 15 per month, saving $2,500 monthly—or $30,000 annually. Even after accounting for the cost of carrying inventory, the net profit lift is roughly $24,000 per year per truck.

The Top 20 Essential SKUs per Brand

You don't need to carry every part. You need the right parts. Analysis of field data suggests that 20 SKUs cover nearly 60% of common part-failure repairs across the top 5 brands (Whirlpool, GE, Samsung, LG, Bosch):

• Thermal Fuses & Sensors: The #1 culprit for "no heat" calls.
• Door Switches & Latches: Inexpensive and high-failure.
• Drain Pumps: Especially for washers and dishwashers.
• Icemaker Assemblies: The primary failure point in modern refrigerators.
• Common Control Boards: Focus on the highest-volume models in your region.

ROI Calculation Template