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Engineering Stack Exchange

Questions tagged [cost-estimation]

13 questions
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How to estimate the time cost of interrupting a task and picking it up again later

In terms of personal productivity (single machine scheduling) when a task is interrupted before being done in order to switch to a different task, it incurres a 'tear down' time cost - putting tools, files, materials away etc. It also incurres a…
snowfrogdev
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Trying to understand how much it costs to run my clothes dryer

I am trying to calculate the running cost of my clothes dryer and have bought myself an energy meter to check its usage. I plugged the meter in, reset it, and then turned it over to the aggregate kWh mode and did a single drying session with wet…
Grant
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What is the energy and capital cost of NH3 from Haber Bosch plant that takes in pure H2 and N2?

A question that becomes particularly relevant for "the hydrogen economy" or in the event that IGCC coal baseload electric generation seeks off-peak markets for hydrogen. I can't seem to locate a breakdown of the costs of Haber Bosch plants adequate…
James Bowery
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How much aluminum does a HV, MV or LV transmission line use?

I have accurate statistics about the total length of high-voltage (110-400 kV), medium-voltage (1-70 kV) and low-voltage (0-1 kV) transmission lines in my country, and they are: High-voltage: 22 500 km Medium-voltage: 140 000 km Low-voltage: 240…
juhist
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Understanding metalwork manufacture -- How are Purchase Quotations prepared?

I have been involved with a number of metalwork design projects lately and I'm increasingly finding myself asking for quotations for small prototype runs (often one-off jobs) to verify the validity of a design. The kind of items I'm talking about…
user6335
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When is a heat exchanger worth it?

I am currently working on a huge industrial process for a student project and we need to transfer around 25MW of energy between dozens and dozens of streams, some larger and some smaller ones. Many even with gas/gas exchange, and those tend to get…
passwortknacker
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Bills of Quantities for Highway Works (UK)

Does anyone know a software/tool, which allows creating Bill of Quantities in accordance with Manual of Contract Documents for Highway Works (UK)? In particular, I am interested in working with the Library of Standard Items and also using a tool,…
Von Ras
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How to combine ODE parameters values from several estimations?

I would like to perform parameters estimation for a differential equation from experiment. If the value of these parameters are obtained from several experiments (repetitions) where for each experiment different final cost function is obtained, how…
Mei
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How to calculate the start-up cost of a natural gas boiler

How I can calculate or find a value for the start-up cost of a natural gas boiler? The boiler will have a capacity of about 700 kW and is intended for heating the water for a greenhouse.
user5026
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"Cost fordest" and "Porded point" - meanings of terms

Not so long ago in our organization there was a seminar on machine-building issues related to parallel robots. The seminar was attended (in a remote format) by an Iranian-speaking colleague who spoke from Tehran. But that's not the point. He uttered…
dtn
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Estimate Annual Maintenance Cost

Suppose, I am trying to install a completely new manufacturing plant, so I have no previous data to help me. I want to calculate a rough estimate of my annual maintenance cost of machinery. Is there a way possible? Note: We have purchased reused,…
Mayank Dhiman
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How to write a Cost engineering support plan?

How would I write a Cost Engineering support plan which reflects the Project Control Cycle? A wine company is wondering if they should invest in another factory. Only this time it will be in the USA. This will be their first factory in the USA and…
John
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What determines the cost of the wind turbines?

If there is an 11kW wind turbine, and a 15kW wind turbine. Why is the 15 kw wind turbine more expensive? I know it seems like a basic question, but what exactly makes it more expensive? Is it only the generator? Or is there something less obvious…
Mohdak
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