Economics API

The deterministic economics interface is available from pyextrusion.economics.

Public objects

• BasicCostSpec — explicit hourly, material, scrap, tooling and commercial assumptions;
• EconomicProductionBasis — production time, manufactured good mass, revenue-generating good mass and scrap mass;
• calculate_basic_economics() — recurring and first-run cost, revenue and sales-margin calculation;
• BasicEconomicResult — structured result returned by the calculation.

Complete example

from pyextrusion.economics import (
    BasicCostSpec,
    EconomicProductionBasis,
    calculate_basic_economics,
)

costs = BasicCostSpec(
    press_hour_cost=200.0,
    maintenance_hour_cost=20.0,
    labor_hour_cost=30.0,
    raw_material_cost_per_kg=3.0,
    scrap_processing_cost_per_kg=0.20,
    scrap_sale_value_per_kg=1.50,
    good_product_sale_value_per_kg=5.00,
    target_profit_margin_pct=20.0,
    die_cost=2000.0,
    extra_tooling_cost=500.0,
    die_trial_count=3,
    die_trial_cost_each=250.0,
    currency="EUR",
)
production = EconomicProductionBasis(
    production_time_h=2.0,
    good_kg_manufactured=900.0,
    revenue_good_kg=800.0,
    scrap_kg=100.0,
)

result = calculate_basic_economics(costs, production)

print(result.recurring_cost)
print(result.first_run_cost)
print(result.recurring_profit_margin_pct)
print(result.target_value_per_kg_first_run)

All amounts and the currency label are supplied by the caller. The API does not perform currency conversion or infer taxes, depreciation, financing, energy, overheads, transport or customer acceptance of overproduction.

See Basic economics for calculation meaning and boundaries.