Category Cable based logging / Tower yarder

Costs per hour
In this calculation only direct costs for a machine/equipment are retrieved. This does not include labour costs for operation or transfer of machinery nor costs for administration, buildings etc. of an enterprise.

Cost of depreciation per operating hour = Pr / (Nr * JA)

Pr...Price of machinery/equipment
Nr...Reduced time of economic use in years
JA...Annual workload in operating hours

Interest
Interest is calculated for one half of the price of the machinery for a reduced time of economic use. This ensures an interest which is the same for all years of use.

Expense of interest per operating hour = (Pr / 2) * (p / 100) * (Nr / Hr)

Pr...Price
p....Interest rate in percent
Nr...Reduced time of use in years
Hr...Reduced operating hours of use

Cost of repair
The calculation is done using a coefficient deduced from empiric values. This coefficient is the relation between cost of repair and the price of the new equipment/machinery for maximum operating hours of economic use. For a lower annual workload the cost of repair is reduced by a factor consisting of reduced hours of use divided by maximum hours of use. This takes the fact of a lower total amount of operating hours and therefore lower repair costs into consideration.

Cost of repair per operating hour = (Pr / H) * (Hr / H) * r

Pr...Price of equipment/machinery
H....Maximum hours of economic use
Hr...Reduced duration of use in operating hours
r....Cost of repair price coefficient

Cost of garage per operating hour = (V * KS) / JA

V.....Required space in cubic meters
KS...Cost of building per cubic meter and year in €
JA...Annual workload in operating hours

Cost of fuel per operating hour = l * TP

l......Average fuel consumption in liter per operating hour
TP...Price of fuel per liter excluding VAT

Cost of lubrification is calculated as a percentage of cost of fuel.

Cost of lubrification per operating hour = TK * (SP / 100)

TK...Cost of fuel per operating hour
SP...Lubrification percentage