Freeware by Thomas Kisko, P.E.

Industrial and Systems Engineering Department

University of Florida

303 Weil Hall

Gainesville, Florida 32611

Students and practitioners of engineering economy are
faced with the unenviable task of evaluating engineering economy expressions.
If the example expression:

1000 * (P/F,10,5) - 500 * (P/F,6,20) + 100 * (P/A,8,20)

were solved manually, it would require three table look-ups
to determine the values of the cash flow factors. Even with a spreadsheet,
determining the value of the expression would take some work.

The Engineering Economy Expression Evaluator, EEEE, is
a public domain, PC compatible, computer program that solves engineering
economy expressions. The above expression can be entered into EEEE __exactly__
as written, and the computer will respond with the evaluated result.

Other features of EEEE include: plotting, root finding to solve for unknowns (e.g. rate of return), variables and variable references (e.g. Y = 500*(F/P,9,5)+X), a built-in line editor with expression recall, and a help facility.

Here are some sample EEEE expressions:`
`

`2+2
:A simple expression`
`100*(P/A,7,3)*(P/F,7,1)+200*(P/F,7,5)
:A cash flow`
`i=8
:Set interest to 8%`
`100*(P/A,i,3)*(P/F,i,1)+200*(P/F,i,5)
:Try cash flow at 8%`
`100*(P/A,i,3)*(P/F,i,1)+200*(P/F,i,6)
:Try $200 at period 6`
`SOLVE(100*(P/A,i,3)*(P/F,i,1)+200*(P/F,i,5)-370,i)
:IRR when NPV=370`
`SECANT(100*(P/A,i,3)*(P/F,i,1)+200*(P/F,i,5)-370,i):SECANT
is fast`
`FINDALL(-180+100*(P/A,I,5)*(1-(P/F,I,5))+200*(P/F,I,20),I)
:Find IRR`
`FINDALL((X-3)*(X-5.5),X)
:Roots of polynomial`
`FINDALL((X-3)*(X-5.5),X,,,,,,20)
:Converges with 20 iterations`

Here is a sample EEEE screen:

To download EEEE, click here. Place the eeee.exe file in a convienient location on your hard drive and double click on it to run it. Press F1 for help.