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Building a Better Business Case and ROI
“A key Concept: The Time Value of Money”
These articles are provided so you can be familiar with the terms and methodology your CFO probably uses. Ultimately he/she will be evaluating a project you want to implement at your company.
The time value of money is a central concept in all of the Business Case Analysis methods. As mentioned in earlier articles, the reason is that an amount of money received today has greater value than getting that same amount of money next week, quarter, or year. Two important terms are present value and future value.
The time value of money is affected by two primary factors: the time between now and a date in the future, and the interest rate. In finance terms, the time element is measured in the number of time "periods", which can be set in days, months, quarters, or years. The interest rate is the percentage increase of the speed, or rate, at which money or "capital" grows in value over time.
Present value (PV) is the currency value of what capital, received at a future date, is equivalent to in today's dollars. Future value (FV) is the currency value of what capital, at this moment, will be equal to at a future date. Both use time and interest rate in their calculations. When performing the calculations for PV and FV, it is critical to be consistent with the measures of time and interest.
Another related term to the interest rate is the discount rate. The interest rate is forward looking: how capital increases in value over time (think future value). But because the value of capital increases over time, capital that we will receive in the future will be worth less than it is in today's terms. Why? Because we did not have it to invest. How much less is it worth? The value by which it will be decreased in value, relative to today's terms, is its discounted value. The discount rate is the rate by which we diminish the value of capital which will be received in the future.
Let's illustrate using a brief example. $10,000 in 1 year at an interest rate of 10% is worth $11,000, otherwise called its future value. The present value of $11,000 to be received 1 year from now is equal to $10,000, assuming a discount rate of 10%.
DCF: Discounted Cash Flow
DCF is a newer technique, about 50 years old, and is a favored method with finance and investment professionals. DCF is, as its name implies, a sum of the cash flows from an investment/purchase, adjusted for the diminished or discounted value of dollars received in the future. DCF is closely related to net cash flow (NCF), internal rate of return (IRR), and net present value (NPV), but it adjusts and compensates for the time value of money.
Example: You've decided to purchase a new conveyor system. You are expecting that it will both save money and help generate greater revenues, but it will take 3 years to begin seeing the cost advantages and revenues. DCF tells us what the monetary value of those dollars in will be in 3 years, less the cost of obtaining
A strength of DCF is for comparative purposes, that is, when comparing 2 or more different scenarios, each with differing cash flow streams. Note that it can be used to compare different alternatives for the use of capital, not just for comparing projects. Also, managers specifically trained in finance may prefer the analysis using both discounted and non discounted methods.
How expressed: DCF is a series of dollar values over the time period(s) indicated, expressed in positive (cash is generated or created) or negative (cash is used or consumed) terms.
How to evaluate: Higher positive DCF values are better, as they indicate greater cash flows.
Strength: Discretely illustrates cash flows on a period by period basis, adjusted for the time value of money, and is a preferable method for comparing multiple scenarios or choices.
Weakness: Similar to ROI, DCF can be complex and time consuming to accurately construct
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