The two types of illustrative material used by a systems company to help a customer visualize the overall system are:
A. assembly and detail
B. working and assembly
C. perspective and scale model
D. assembly and subassembly
Answer: C
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Solution 19.27 Repeat Problem 19.26, except use the normal distribution for the CFAT in years 7 through 10 with an expected value of $2 million and a standard deviation of $500,000.
Problem 19.26
Jennifer, a senior project manager, estimated net cash flow after taxes (CFAT) for a large project she is working on. The additional CFAT of $2,800,000 in year 10 is the salvage value, estimated at 9% of the $31 million first cost for all capital assets.
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The PW value at the current MARR of 7% per year is
PW = ?31,000 + 5400(P?A,7%,6) + 2040(P?A,7%,4)(P?F,7%,6) + 2800(P?F,7%,10) = $767
Jennifer believes the MARR will vary over a relatively narrow range, as will the CFAT, especially during the out years of 7 through 10. She is willing to accept the other estimates as certain. Use the following probability distribution assumptions for MARR and CFAT to perform a simulation—hand- or spreadsheet-based.
MARR. Uniform distribution over the range 6% to 10%.
CFAT, years 7 through 10. Uniform distribution over the range $1,600,000 to $2,400,000 for each year.
Plot the resulting PW distribution. Should the plan be accepted using decision making under certainty? Under risk?
In most soils the overall population (numbers) of microorganisms changes with time, generally following changes in the:
A) concentrations of antibiotics. B) pore space. C) availability of root infection sites. D) supply of oxygen. E) supply of decomposable organic matter.
The advantage of compliance in a scroll compressor is that:
A) The orbiting scroll can separate and unload to pass a small liquid slug. B) The compressor is very flexible in its application. C) The compressor complies with all national compressor standards. D) The top of the compressor can be rotated 180° to comply with many refrigerant piping arrangements.
Two technicians are discussing an alternator with zero output. Technician A says the field circuit may have an open circuit. Technician B says the fusible link may be open from the battery to the alternator. Who is right?
A. Technician A B. Technician B C. Both Technicians A and B D. Neither Technician A nor B