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A short class with Sarah and her students. The other ways are under More.
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Today's lesson is about estimating ownership costs. What do you think is included in ownership costs?
Probably the purchase price of the equipment?
Yes, that's correct! Ownership costs include not only the purchase price but also depreciation, interest, insurance, and taxes. Can anyone tell me how we might calculate depreciation?
Isn't it based on the initial cost minus the salvage value divided by useful life?
"Exactly! Remember the formula:
Now that we understand ownership costs, let's move to operating costs. What types of expenses do you think are included?
I think fuel costs would definitely be one.
And also wages for operators!
Exactly! Let's break it down: operating costs include fuel, labor, tire wear, and maintenance. How would we estimate fuel costs?
Is it based on fuel consumption and cost per liter?
Right again! For example, if the truck consumes 0.09 liters per horsepower, and it has 250 horsepower, with fuel costing ₹65 per liter, what’s the fuel cost?
That would be ₹1462.50 per hour.
Great job! Remember, adding all these together gives us the total operating costs.
Now that we have ownership and operating costs, how do we determine the total cost to operate a piece of equipment?
Do we just add the two costs together?
Yes! The total cost is the sum of ownership cost, operating cost, and operator wages. Can anyone compute this using our truck example?
You would add the hourly ownership cost of ₹2713, the operating cost of ₹3209.29, and operator wages of ₹200.
Exactly! What do you get?
A total of ₹6122.29 per hour!
Perfect! To summarize, knowing how to estimate equipment costs helps in the overall project budgeting.
Let's talk about the significance of Peurifoy's Method. Why do you think it is crucial in construction management?
It helps ensure accurate cost estimations for project budgeting.
Correct! Accurate estimations can lead to better financial planning. Does anyone know the potential issues that could arise without accurate estimations?
There could be budget overruns or project delays if the costs are underestimated.
Absolutely! Remember the quote: 'A budget provides a plan, but accurate estimations give clarity.'
Can we reduce the risk of inaccuracies?
Yes, by regularly updating cost data from reliable sources and adjusting your estimations accordingly!
So we should keep referring back to estimation handbooks?
Exactly! That’s a great takeaway. Let’s summarize today's learning about Peurifoy’s Method and its role in making informed decisions.
The total cost involved in owning equipment, including depreciation and interest.
The expenses that occur during the usage of equipment, such as fuel and wages.
Calculating the decrease in value of an asset to determine annual costs.
The sum of ownership and operating costs contributing to total project cost.
For ownership costs think of expenses that sway, depreciation and taxes are here to stay.
Imagine a giant dump truck working all day long, its costs add up with each round it throngs – from fuel to maintenance, each aids its song.
To remember components of equipment costs: O P E R A T E (Ownership, Purchase, Expenses, Repair, Annual cost, Tire, and Energy costs).
C.O.S.T. (Calculation of Operating and Structural Total) for estimating equipment costs.
Term
Ownership Cost
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Term
Operating Cost
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Term
Economic Cost
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The sum of all costs associated with owning equipment, including purchase price, depreciation, interest, insurance, and taxes.
Costs incurred during the operation of machinery, including fuel, labor, and maintenance.
The reduction in the value of an asset over time, calculated based on the initial cost, salvage value, and useful life.
A method for estimating equipment costs based on ownership and operating cost calculations.
An approach to estimating equipment costs that emphasizes accuracy and reliable data sources, prominently used in construction management.
The total cost of using equipment, combining ownership and operating costs.
The expected costs associated with maintenance and repairs of the machinery over a year, often a percentage of initial cost.
The estimated residual value of an asset at the end of its useful life.
This section introduces Peurifoy's Method for estimating equipment costs through ownership and operating costs.
In this section, we explore Peurifoy's Method for calculating equipment costs, which includes ownership costs, operating costs, and methodologies for estimating economic costs through examples involving machinery such as dump trucks. Key considerations include depreciation, interest, insurance, fuel costs, and repair factors.
Peurifoy's Method fundamentally aims to provide a structured approach to equipment cost estimation, encompassing ownership and operating costs. It starts by summing ownership costs, which include the initial price minus tire costs and depreciation, with operating costs that incorporate fuel, labor, and maintenance expenses. The method exemplifies these principles through a case study involving an off-highway dump truck, detailing how to arrive at total costs by using specific formulas and assumptions regarding annual usage, cost percentages, and applicable adjustments. The section highlights the necessity of accurate data from estimation handbooks and provides a comprehensive breakdown of each costing factor, emphasizing why such methodology is essential in construction engineering.