1. INTRODUCTION OF
GAMS SOFTWARE
By Saied Abbasi Parizi

2. OUTLINE
• About lecturer
• Introduction of GAMS
• Necessity of GAMS
• MODEL STRUCTURE
• Sample code
• Course contents

3. ABOUT LECTURER
Education
M.Sc.: Industrial Engineering, Amirkabir University of Technology
(Tehran Polytechnic), Iran (2011 to 2013)
Dissertation Title: Hub location problem based on nondeterministic
network characteristics
Supervisor: Dr. Aminnayeri
Advisor: Dr. Bashiri
B.Sc.: Industrial Engineering (Industrial Technology), Islamic Azad
University of Kerman, Iran (2005 to 2009)
Dissertation Title: Qualitative study of the causes of failure in the fiber
structure using control charts, case study: Rafsanjani fiber plant
Industrial Complex

4. 4
Publications
1- “A Bender’s Decomposition Algorithm for Multi-Objective Hub Location Problem
Considering Stochastic Characteristics”
- Journal of Industrial Engineering (JIENG), PSST 2014; Tehran; Iran. [http://jieng.ut.ac.ir/]
2- “A Bender’s Decomposition Algorithm for Multi-Objective Stochastic Fuzzy Hub
Location Problem”
- 13th Iranian Conference on Fuzzy Systems (IFSC), PSST 2013; Ghazvin; Iran.
[http://www.ifsc2013.ir/]
3- A book on subject of “Industrial Engineering and a Selection of Master Entrance
Exam Tests with Solution Key Points”
- Under Publication
Publications in press
1- “Robust Solution for a Min-max Regret Multi-Objective Hub Location Problem
Based on Bender’s Decomposition in A Fuzzy Stochastic Environment”
- Submitted to Computer and Operation Researches (COR-Indexed ISI).
[http://www.journals.elsevier.com/computers-and-operations-research/]

5. 5
Research Interests
 Hub Location Problems
 Supply Chain Management
 Stochastic Optimization
 Robust Optimization
 Combinatorial Optimization
 Mathematical Modeling
 Linear Programing

6. 6
Work Experiences
 Educational Advisor in Binesh institution (2010-2012)
 Present the GAMS commercial software in Shahed University (2013-2014)
 Present the Bender’s decomposition method in Shahed University (2013-2014)
 Manager of public relations in industrial engineering scientific association of
Islamic Azad University of Kerman(2005-2009)
 Project member in evaluation of copper rod production line and provision of
practical solutions for productivity improvement based on motion and job study -
Rafsanjan Copper plant Industrial Complex(2006-2007)
Honors & Awards
 Top student - the undergraduate course on Islamic Azad University, Kerman
 Top rank in National Iranian Cooper Industries Company employment exam
 Receiving annual scientific award for 2008-DISA of Islamic Azad University of
Kerman

7. 7
INTRODUCTION
OF
GAMS
The Most Important Features of GAMS
• Capability to solve from small scale to large scale problems with small code by
means of the use of index to write blocks of similar constraints from only one
constraint.
• The model is independent from the solution method, and it can be solved by
different solutions methods by only changing the solver.

8. 8
NECESSITY OF
GAMS

9. 9
MODEL STRUCTURE

10. 10
SAMPLE CODE

11. 11
 Set, Multidimensional set, Sub set, Dynamic set
 Scalar, Parameter, Table, Data entry by direct assignment
 Reserved words, Functions, Different variable types, Bound definition for variables
 Equations, Conditional equations, Generating a feasible solution for equation system
 Model, Solve statements
 Display, Set solver type, Reduce outputs
 Sample cod
 Options, Operator, For-Loop-While-If-If Else-Repeat functions, Dollar control options
 GAMS output, Sorting output
 Model status, Solver status, Errors description
 Infeasibility model recognition
 Link between GAMS and other software
 Hub location problem
 Supply chain problem
 DEA problem
COURSE CONTENTS

12. • Question?