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Operations Research Models and Methods
 
Computation Section
Using Add-ins

Unit Version of Excel

To use the programs in this package, you must have access to a Macintosh or IBM compatible computer with the Microsoft Excel program installed. For the Windows operating system, the version of Excel must be 97 or later. For the Macintosh operating system the version must be 98 or later. The Solver Add-in that comes with Excel should also be installed to solve deterministic optimization problems.


Unit Installing Add-ins

The Add-ins files may be placed anywhere on the hard disk or even on a floppy disk. One procedure is to create a directory (or folder) entitled "jensen.lib" and place it in the directory called "Add-ins" created by the Microsoft installation program. The add-in files are then placed in the "jensen.lib" directory. Alternatively, the add-in files may placed in any directory on the hard disk. It is important to put all the ORMM add-ins in the same directory.

To use an Add-in first open the Excel program. Choose the "Add-Ins" command from the Tools menu. A dialog box showing the current list of Add-ins appears as in the figure below. Add-ins are identified by name. A check in the box next to the name means that the add-in is installed, while an unchecked box means that it is not installed. If an add-in that you want does not appear in the list use the Select... or Browse... button to move to the directory in which the ORMM add-ins are stored. The most convenient way to use the ORMM add-ins is to first install the Add ORMM add-in. All the others can be installed from the dialog box of the Add ORMM add-in.

When any one of the ORMM add-ins are installed a new menu item, OR_MM, is added to the Worksheet menu. The OR_MM menu lists references to Visual Basic programs provided by the add-in. Selecting any one of these produces a dialog box that accepts additional information required by the program.

In addition to the programs reached through the menu, an add-in may provide new functions that are listed as User Defined functions in the Excel function list. These functions are used just like the normal built in functions of Excel.

A more convenient alternative to installing the add-ins in this package through the Tools menu is to use the OR_MM Control add-in.



Unit Add-in Names

The names of the OR_MM Add-ins with their associated file names are in the list below. The right column of the table shows the names used to represent the files in the Add-in List. If a name does not appear, use the Browse command to locate the associated file name listed on the left. The add-in is installed by clicking on the check box adjacent to the name. Remember that add-ins consume part of the memory allotted to Excel. Add-ins also increase the time required for Excel to launch. If you experience trouble, a possible remedy is to decrease the number of add-ins installed.

 File Name

 Name in Add-in List

 add_ormm.xla

 Add ORMM

 demo.xla

 Demonstrations

 mp_models.xla

 Math Programming Models

lpip_solver.xla

 LP/IP Solver

 net_solver.xla

 Network Solver

 ran_var.xla

 Random Variables

stochmod.xla
Stochastic Models

 stochanal.xla

 Stochastic Analysis

 queue.xla

 Queues

 decision.xla

 Decision Analysis

teachlp.xla
Teach LP
teachnet.xla
Teach Network
teachtr.xla
Teach Transportation
teachip.xla
Teach IP
teachnl.xla
Teach NLP
teachdp.xla
TeachDP


Add ORMM


The easiest way to add and delete add-ins is with the Add ORMM add-in. Once this is installed, the item "OR_MM" appears on the main menu of Excel. Selecting the Add ORMM item produces a dialog showing all the add-ins. Listed add-ins can be installed and removed by simply clicking a checkbox. See the instructions for this add-in.

  
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Operations Research Models and Methods
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by Paul A. Jensen
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