Appliance Repair Business input evidence register
44 numeric input paths with their assumptions, calculation bases and cited sources.
Case updated September 14, 2026. This technical appendix accompanies the complete case methodology and source register.
Dataset use notice: no Creative Commons license or DOI is asserted. Referenced material remains subject to its publisher’s terms.
A linked reference can support scope without confirming an exact forecast. Assumption entries identify values that still require local validation. Each field path identifies an input in the common business record.
- Model assumption
Authored two-van opening allocation. Current diagnostic, handling, recovery, new-van, startup-cost and state-registration sources inform categories but do not verify used vehicles, complete tools, parts inventory, compliance cost or reserve.
capital.total · capital.low · capital.high · capital.items.0.amount · capital.items.1.amount · capital.items.2.amount · capital.items.3.amount · capital.items.4.amount · capital.items.5.amount · capital.items.6.amount
- Model assumption
Authored completed-job path. Year three is 5 jobs × $425 × 5 days × 50 weeks. Official sources establish service-sector context but not local price, volume, conversion or completion.
forecast.years.0.revenue · forecast.years.1.revenue · forecast.years.2.revenue · forecast.years.3.revenue · forecast.years.4.revenue
- Model assumption
Authored 30% pool for parts, payment fees, route fuel and other sales-linked leakage. Replace it with parts purchases and returns, miles, discounts, credits, repeat visits and callbacks.
forecast.years.0.costOfSales · forecast.years.1.costOfSales · forecast.years.2.costOfSales · forecast.years.3.costOfSales · forecast.years.4.costOfSales
- Model assumption
Authored paid working-owner and employee-technician schedule with employer-cost allowance. National occupation pay and federal payroll-tax components are context only.
forecast.years.0.payroll · forecast.years.1.payroll · forecast.years.2.payroll · forecast.years.3.payroll · forecast.years.4.payroll
- Model assumption
Authored vehicle, insurance, equipment, software, marketing and administration schedule. It is not a local quote or dated cash forecast.
forecast.years.0.occupancyAndOther · forecast.years.1.occupancyAndOther · forecast.years.2.occupancyAndOther · forecast.years.3.occupancyAndOther · forecast.years.4.occupancyAndOther
- Model assumption
Authored completed-job break-even bridge. The $425 ticket, five jobs, 70% contribution, fixed cost and ramp must be reconciled to billable hours, diagnosis, parts, repeat visits, route time and collection.
unitEconomics.driver.model · unitEconomics.driver.low · unitEconomics.driver.high · unitEconomics.volume.model · unitEconomics.volume.low · unitEconomics.volume.high · unitEconomics.daysPerWeek.model · unitEconomics.daysPerWeek.low · unitEconomics.daysPerWeek.high · unitEconomics.fixedCostsMonthly · unitEconomics.contributionMargin · unitEconomics.ramp.startShare · unitEconomics.ramp.stepPerMonth · unitEconomics.ramp.horizonMonths