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Machinery Costs and Benefits

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Understanding the costs associated with the machinery used to harvest timber is necessary in order to conduct a profitable job. The cost associated with timber harvest dictates the price that a contractor can pay for timber. The most accurate way to calculate cost is to use historical records of your operation. If you don't have the records for your machine or want to estimate how a new piece of machinery will affect your cost you can use machine rate calculations.

A machine rate calculation uses data collected for machinery to make estimations of cost based on information for a piece of machinery. The required inputs are listed below followed by the cost equations.

Machine Rate Calculation

Inputs
Purchase price P
Machine horse power rating hp
Machine life N
Salvage value % S%
Utilization rate U%
Repair and Maintenance, percent of depreciation R&M
Interest rate I
Insurance and tax rate IT
Fuel consumption rate FC
Fuel price $F
Lube and oil, percent of fuel cost L
Operator wage and benefits W
Fringe benefit percentage B
Scheduled machine hours SMH
Calculations
Salvage Value (S) = P × S %
Average Yearly Investment (AVI) = (P - S) × (N + 1)
2 × N
+ (S)
Productive Machine Hours (PMH) = SMH × U%
Ownership Cost
Annual Depreciation (D) = P - (S)
N
Interest Cost = AVI × I
Insurance and tax = AVI × IT
Operating Cost
Fuel Cost = FC × HP × PMH × $F
Lubrication Cost = FC × HP × PMH × $F × L
Repair and Maintenance = D × R&M
Labor Cost
Labor Cost = W × SMH + (W × SMH × B)

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Created: 2007-05-08 , Updated: 2007-08-03

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Facts

8% of All Manufacturing is Wood; approximately 2000 wood manufacturers