industral engineering.ppt

FINANCIAL MANAGEMENT AND ENGINEERING ECONOMY contents Engineering Economy 4 Introduction 1 Accounting 2 Cost Accounting 3 Interest Factors 5 Back to Gadgets Present Worth Calculations 6 Impact of the Computer on Accounting and Engineering Economy 7 Interest Factors The purpose of the interest factors developed here is to be able to explicitly evaluate the desirability of tying money up one place versus investing in another place . 在这里利息因素的目的，是要明确评价在一个地方占用资金还是将这笔资金投到其他地方的意愿。 single payment compound amount factor Suppose that you have $1,000 today and could invest that at 12% interest per year for 5 years . what would the $1,000 be worth then? Now , this could be done for all such problems , but there is a simpler way involving the use of factors . But before doing that , we shall define some symbols . i=annual interest rate n=number of annual interest periods p=present principal sum A=sing payment in a series of n equal payments made at the end of each annual interest period F=future sum,n annual period hence,equal to the compound amount of a present principal sum p, or equal to the sum of the compound amounts of payments ,A ,in a series Other Interest Factors As might be expected,factors can be derived in a similar manner for all combinations of P,F,and A. Find P given F Find F given A Find A given F Find P given A Find A given P All these factors can be tabulated for selected annual interest rates and annual interest periods. Examples-Single Payment Compound-amount factor 本利和 F=P(F|p i,n) Present-worth factor现值 P=F(P|F i,n) Examples-Equal Payment Series Compound-amount factor本利和 F=A(F|A i,n) Capital-recovery factor本金回收 A=P(A|P i,n) Examples-Equal Payment Series Sinking-fund factor偿债基金 A=F(A|F i,n) Present-worth factor现值 P=A(P|A i,n) End—3 concepts Cash flow-- in a certain period of time, movement of money into and out of a system Time value of money-- the monetary with the passage of time and produce