The second data entry window consists of four fields for each of the
variables specified in the first window. The example shown below as-
sumes that the analysis is to be performed on three variables. As shown, a
name, mean, coefficient of variation (C.V.), and cost must be specified for
each variable. As before, the arrow keys allow for movement between the
fields. Variable names can contain any characters (uppercase or lower-
case, numbers may also be used), but blank spaces are not allowed in vari-
able names. Decimal points are not required in the remaining fields but
are expressed as a decimal
should be used for clarity. Values for the
fraction and not as a percentage. For example, the C.V. would be expressed
as 0.50, not as 50.0 percent, for a variable with a mean of 50.0 and a stand-
ard deviation of 25.0.
DECISION MATRIX
MEAN
NAME
VARIABLE
UNIT COST
2
3
Error Messages
As the data are entered into the program,
checks for er-
rors. The program checks the fields for number of variables, error prob-
ability, and precision `for nonnumeric characters. If any are found,
will issue one of the following error messages:
INPUT ERROR: NUMBER OF VARIABLES INCORRECTLY ENTERED
INPUT ERROR: ERROR PROBABILITY INCORRECTLY ENTERED
INCORRECTLY ENTERED
INPUT ERROR:
The program also checks these same fields to determine if the values
entered are within the range of values supported by the program. If any
fall outside of the range of supported values, the program will issue one of
the following messages:
INPUT ERROR: NUMBER OF VARIABLES IS OUT OF RANGE
INPUT ERROR: ERROR PROBABILITY IS OUT OF RANGE
INPUT ERROR: LEVEL OF PRECISION IS OUT OF RANGE
Chapter 2 Decision Matrices
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