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#EDIT8.2
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════════════════════════════════════════════════════════════
MATHEMATICAL Formulations (EQUATIONS) Method
════════════════════════════════════════════════════════════
BEST-PLAN also supports the typical academic use of linear
programming by formulating a number of linear equations,
called ROWS/EQUATIONs (constraints), with VARIABLES which
may contribute to a desired OBJECTIVE FUNCTION.
MODEL entry is accomplished through data statements similar
to those described in the STEP-BY-STEP Flow Representation
Method. The equation VARIABLES are treated and represented
as RESOURCES(see Resource Description). The following data
statements will therefore apply:
- RESOURCE Description data statements, using the keyword
VARIABLES instead of RESOURCES.
- LIMITS data statements, to specify value constraints for
a given VARIABLE. Consequently, the following data
statements also applies: FIXED, L.L. and U.L.(see FIXED,
L.L. and U.L. data entry statements)
...more information on next view
Additional data statements are available to complete the
MODEL entry. These will be discussed in this section with
the given Demonstration Problem. The additional data
statements are as follows:
- EQUATE/EQUATION data statements which establish the ROWS
or CONSTRAINTS for the model.
- MAXIMIZE/MINIMIZE data statements which establish the
model's OBJECTIVE FUNCTION.
BEST-PLAN by default, automatically creates an OBJECTIVE
FUNCTION called " max: profit". This objective function is
the COST ROW or the summation of all resources'(VARIABLES)
PRICES. For a similar objective function requirement, the
PRICE/COST data statement may be used to automatically
formulate this OBJECTIVE FUNCTION.
...more information on next view
VARIABLES IDENTIFICATION
VARIABLES will be treated just like RESOURCES as discussed
in the preceeding section. They will carry the same
informational data as entered by the planner during data-
entry and same data computed by BEST-PLAN after the
optimization of the plan. The minimal informational
requirement for a variable is the variable number (1-9999)
and name identification.
Variable data declaration is as follows:
VARIABLE #nnnn = name identification(30-characters)
#nnnn = variable number (1-9999)
VARIABLE,RESOURCE are synonymous and can be used
interchangeably.(see. UTILITY)
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