Презентация Risk and Uncertainty онлайн

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    1,2,3,4,5,6,7,8,9,10,11
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Слайды и текст к этой презентации:

№1 слайд
Chapter Dealing with
Содержание слайда: Chapter 10 – Dealing with Uncertainty
№2 слайд
Risk and Uncertainty Risk and
Содержание слайда: Risk and Uncertainty Risk and uncertainty are similar in that they both present the problem of not knowing what future conditions will be Risk offers estimates of probabilities for possible outcomes Uncertainty does not provide estimates of probabilities for possible outcomes This book treats them as interchangeable
№3 слайд
Four major Sources of
Содержание слайда: Four major Sources of Uncertainty Possible inaccuracy of cash-flow estimates used in the study Type of business relative to the future health of the economy Type of physical plant and equipment involved Length of study period
№4 слайд
Possible Inaccuracy of
Содержание слайда: Possible Inaccuracy of Cash-flow estimates How much source information is available How dependable is the source information Uncertainty in capital investment requirements is often reflected as a contingency above actual cost of plant and equipment
№5 слайд
Type of Business Involved
Содержание слайда: Type of Business Involved Relative to Health of Economy Some businesses will typically be more at risk of declining with when there is a general decline in the economy -- when the economy has gone into recession
№6 слайд
Type of Physical Plant and
Содержание слайда: Type of Physical Plant and Equipment Involved Some types of structures and equipment have definite economic lives and market values – they may be used in a multitude of settings Other dwellings and equipment, being made for very specific and singular functions, may have little or no resale value
№7 слайд
Length of Study Period The
Содержание слайда: Length of Study Period The longer the study period, the greater the level of uncertainty of a capital investment
№8 слайд
Sensitivity Analysis
Содержание слайда: Sensitivity Analysis Sensitivity – The degree to which a measure of merit (i.e., PW, IRR, etc…) will change as a result of changes in one or more of the study factor values. Sensitivity Analysis Techniques Breakeven Analysis Sensitivity Graph (spider-plot) Combination of factors
№9 слайд
Breakeven Analysis Technique
Содержание слайда: Breakeven Analysis Technique commonly used when an uncertain single factor (EG: capacity utilization) determines the selection of an alternative or acceptability of an engineering project For given alternative, if best estimate of actual outcome of common factor is higher or lower than the breakeven point, and assumed certain, the best alternative becomes apparent
№10 слайд
Breakeven Analysis
Содержание слайда: Breakeven Analysis Indifference between alternatives (EWA = f1(y); EWB = f2(y) EWA = EWB; f1(y) = f2(y) : Solve for y Economic acceptability of engineering project EWp = f(z) = 0 The value of ‘z’ is the value at which we would be indifferent between accepting or rejecting the project
№11 слайд
Breakeven Problem Involving
Содержание слайда: Breakeven Problem Involving Two Alternatives Most easily approached mathematically by equating an equivalent worth of the two alternatives expressed as a function of the factor of interest
№12 слайд
Breakeven Analysis for
Содержание слайда: Breakeven Analysis for Economic Acceptability of an Engineering Project Most easily approached by equating an equivalent worth of the project to zero as a function of the factor of concern Because of the potential difference in project lives, care should be taken to determine whether the co-terminated or the repeatability assumption best fits the situation
№13 слайд
Example applications of
Содержание слайда: Example applications of Breakeven Analysis Annual revenue and expenses Rate of return Market (or salvage) value Equipment Life Capacity utilization
№14 слайд
Example Two electric motors
Содержание слайда: Example Two electric motors are being considered to power an industrial hoist. Each is capable of providing 90 hp. Pertinent data for each motor are presented bellow. If the expected usage of the hoist is 500 hr per year, what would the cost of electrical energy have to be (in cents per kilowatt-hour) before the D-R motor is favored over the Westhouse motor? The MARR is 12% per year. [Note: 1hp = 0.746KW]
№15 слайд
Example
Содержание слайда: Example
№16 слайд
Example Solution Let X
Содержание слайда: Example: Solution Let X = electrical energy cost in $/kW-hr. Equate the equivalent uniform annual worth of both motors:   AWD-R(12%) = AWWH(12%)   -$2,500(A/P,12%,10) - $40 - (90 hp/0.74)(0.746 kW/hp)(500 hrs)(X / kW-hr) = -$3,200(A/P,12%,10) - $60 - (90 hp/0.89)(0.746 kW/hp)(500 hrs)(X / kW-hr)   $482.5 + ($45,364.87)(X) = $626.4 + ($37,719.10)(X)   X = $143.90 / $7,645.77 = $0.0188 / kW-hr or 1.88¢ / kW-hr
№17 слайд
Sensitivity Grapfh
Содержание слайда: Sensitivity Grapfh (Spider-plot) An analysis tool applicable when the breakeven analysis does not fit the project situation Makes explicit the impact of uncertainty in the estimates of each factor of concern on the economic measure of merit
№18 слайд
EXAMPLE - The best cash-flow
Содержание слайда: EXAMPLE 10-4 The best cash-flow estimates for a machine being considered for installation: Capital Investment (I) = $11,500 Revenues/yr (A) = $5,000 Expenses (A) = $2,000 Market Value (MV) = $1,000 Useful Life (N) = 6 years
№19 слайд
EXAMPLE - Investigate PW over
Содержание слайда: EXAMPLE 10-4 Investigate PW over a range of + 40% changes in estimates for a. Capital investment b. Annual net cash flow c. Market value d. Useful Life PW(10%) = -$11,500 + $3,000 (P / A, 10%, 6) + $1,000 (P / F,10%, 6) = $2,130
№20 слайд
EXAMPLE - a Capital
Содержание слайда: EXAMPLE 10-4 (a) Capital investment varies by + - p PW(10%) = -(1+_ p%/100)*$11,500 + $3,000(P/A, 10%, 6) + $1,000(P/F, 10%, 6) (b) Annual cash flow varies by + - a PW(10%) = - $11,500 + (1+_ a%/100)*$3,000(P/A, 10%, 6) + $1,000(P/F, 10%, 6) (c) Market Value varies by + - s PW(10%) = - $11,500 + $3,000(P/A, 10%, 6) + (1+_ s%/100)*$1,000(P/F, 10%, 6) (d) Useful life varies by + - n PW(10%) = - $11,500 + $3,000(P/A, 10%, (6+_n%/100)) + $1,000(P/F, 10%, (6+_n%/100))
№21 слайд
Sensitivity Graph Spider-plot
Содержание слайда: Sensitivity Graph (Spider-plot) for Four Factors
№22 слайд
Revelations of Spider-plot
Содержание слайда: Revelations of Spider-plot Shows the sensitivity of the present worth to percent deviation changes in each factor’s best estimate Other factors are assumed to remain at their best estimate values The relative degree of sensitivity of the present worth to each factor is indicated by the slope of the curves (the “steeper” the slope of a curve the more sensitive the present worth is to the factor) The intersection of each curve with the abscissa shows the percent change in each factor’s best estimate at which the present worth is zero
№23 слайд
Revelations of spider-plot In
Содержание слайда: Revelations of spider-plot In this example Present worth is insensitive to MV Present worth is sensitive to I, A, and N
№24 слайд
Measuring Sensitivity by a
Содержание слайда: Measuring Sensitivity by a Combination of Factors Develop a sensitivity graph for the project a. For most sensitive factors, improve estimates and reduce range of uncertainty Use sensitivity graph to select most sensitive project factors. Analyze combined effects of these factors on project’s economic measure of merit by: a. Additional graphical technique for two most sensitive factors b. Determine the impact of selected combinations of three or more factors -- scenarios
№25 слайд
Pitfalls of Risk Adjusted
Содержание слайда: Pitfalls of Risk Adjusted MARR A widely used industrial practice for including some consideration of uncertainty is to increase the MARR Even though intent of risk-adjusted MARR is to make more uncertain projects appear less economically attractive, opposite may appear to be true Cost-only projects are made to appear more desirable as the interest rate is adjusted upward to account for uncertainty
№26 слайд
Reduction of Useful Life By
Содержание слайда: Reduction of Useful Life By dropping from consideration those revenues (savings) and expenses that may occur after a reduced study period, heavy emphasis is placed on rapid recovery of capital in early years of a project’s life This method is closely related to the discounted payback technique and suffers from most of the same deficiencies
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