The capital asset pricing model (CAPM) is the dominant model for estimating the cost of equity.
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The most commonly used model to estimate the cost of using external equity capital is the Capital Asset Pricing Model (CAPM). It calculates the cost of equity by considering the risk-free rate of return, the equity risk premium, and the individual company's beta, which measures the systematic risk of the company's stock compared to the overall market.
To calculate capital charge, you can use the formula: Capital Charge = Cost of Equity × Equity + Cost of Debt × Debt. Cost of equity is usually estimated using the Capital Asset Pricing Model (CAPM) or Dividend Discount Model (DDM), while cost of debt is based on the interest rate on debt. By multiplying the respective cost by the amount of equity and debt, you can determine the capital charge.
Cost of equity refers to the rate of return that shareholders expect in return for their investment and as compensation for the risk taken by them in investing into that company. So, from the shareholders' point of view, this expected rate of return (cost of equity) would be the opportunity cost of equity, i.e. the rate of return forgone by investing in the company rather than considering alternative investment options. Cost of equity is determined through various different models such as the Capital Asset Pricing Model (CAPM), Gordon model and many others. Here is more information and calculator of cost of equity with formulas and examples https://trignosource.com/Cost%20of%20equity.html
You can buy construction cost estimating software on eBay. Construction Book Express also has many different types of construction cost estimating software to buy.
An accurate cost accounting system is the basic building block for a good cost estimating system.
An article on cost estimating in the building construction field, admittedly from an out dated source although the principles are still the same, is at http://www.inquirewithin.biz/Vol2/Estimating/estimating_foundations.htm.
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EMINEM
Construction companies do not offer cost estimating as a service. However, they do cost estimates of their projects using one of the software applications available for purchase.
Cost estimating software is used for engineering purpose. It helps them run things at a certain price then ten different prices.
Equity Charge = Equity Capital x Cost of Equity is the formula.