These are Excel addin files (.xla). They are compressed and stored at this site with the (.zip) suffix. Download by clicking on the addin name. The files may be expanded with the free Aladdin Expander. Links are provided to the instructions for each addin. Addins are not used like regular Excel workbook files. They must be installed through the addin dialog on the tools menu or through the Addin_Control. Review the General Instructions for loading addins. 
File Name

Date Modified

Addin Name

Instructions

General Instructions for Addins


8/20/2000 
Addin Control
This addin allows the user to install and remove addins without using the Addin command of the Tools menu. 

8/22/2000

Math Programming
The Mathematical Programming Addin constructs linear programming, integer programming, nonlinear programming, network and transportation models that can be solved using the Excel Solver Addin or one of the solution addins provided in this collection. 

8/20/2000

Linear Programming Solver
This addin provides an algorithm that solves Linear Programming problems. It can be used instead of the Excel solver for the Linear Programming models created by the Mathematical Programming addin. 

10/24/2000

Network Flow Solver
A network solution algorithm is provided by this addin. Network algorithms are generally faster than linear programming algorithms for solving problems that can be modeled entirely as networks. 

8/20/2000

Random Variables
The Random Variables Addin performs computations associated with probability distributions. Random variables with any of 16 different named distributions may be defined. Functions compute probabilities of events, inverse probabilities and moments. Complex probability problems may be solved through simulation. 

8/20/2000

Markov Chain
The Markov Chain Addin performs a wide range of computations associated with Markov Chains including: economic analysis, steady state analysis, computation of nstep probabilities, simulation, computation of first passage probabilities and computation of absorbing state probabilities. 

8/20/2000

Markov Process
The Markov Process Addin performs computations for continuous time Markov Processes. The addin constructs the embedded Markov chain matrix, computes the steady state probabilities for states, performs economic analyses and performs dynamic simulations. 

8/20/2000

Queueing
The Queueing Addin performs calculations associated with Poisson queueing models and allows simple simulations of models not using the Poisson assumption for arrival and service activities. 

8/20/2000

Decision Analysis
The addin creates chance and decision nodes, and evaluates the decision tree to find the optimum policy. 

8/20/2000

Teach Linear Programming The addin teaches three solution algorithms for linear programming, the Tableau Simplex method, the Revised Simplex method and the Interior Point Method. 

8/20/2000

Teach Transportation
This addin is concerned with solving the Transportation problem with the primal simplex method. The program works on problems with up to 10 suppliers or demands. 

8/20/2000

Teach Network
This addin considers the primal simplex method for network flow programming problems. Included are algorithms for the pure and the generalized minimum cost flow problems. 

8/20/2000

Teach Integer Programming
Two methods for solving integer programming problems are shown, branch and bound and Gomery cuts. 

8/20/2000

Teach Nonlinear Programmming 

8/20/2000

Teach Dynamic Programming
The addin provides a structure for the various model components for dynamic programming. The student provides the various components using Excel functions. The optimization algorithms use recursion and reaching to find optimum solutions. 

Link to the original OR Addins site 