Shahid Beheshti University Journal of Industrial Management Perspective 2251-9874 4 1 2014 05 22 Mathematical Modeling of Services Supply Chain of Iran Fixed Communications by Dynamic Systems Approach Mathematical Modeling of Services Supply Chain of Iran Fixed Communications by Dynamic Systems Approach 31 50 87291 FA Nezameddin Faghih Professor, Shiraz University. Habibollah Ranaei Kordshooli Assistant Professor, Shiraz University. Ali Mohammadi Associate Professor, Shiraz University. Ali Hossian Samadi Assistant Professor, Shiraz University. Mohammad Hashem Moosavi Haghighi Assistant Professor, Fars Research Center for Agriculture and Natural Resources. Mohammad Ghafournian Ph.D student, Shiraz University. Journal Article 2019 09 26 <span lang="EN-CA"> In this study </span><span lang="EN-CA">services </span>supply chain of Iran fixed communications<span lang="EN-CA"> is modeled through </span>dynamic systems<span lang="EN-CA"> approach. </span>The information and documentation of Telecommunication Company of Iran from 1384 to 1391 and the results of simulation system dynamics model to 1404  has been used to achieve this aim. In order to analyze and determine the identity of the system, the concept of mathematical modeling of dynamic systems is applied. The modeling results show that this system is controllable and observable which means that the system inputs, the system state variables are controlled and each of the state variables of the system can influence the output of the system .Therefore according to thesimulation data, system is stable. <span lang="EN-CA"> In this study </span><span lang="EN-CA">services </span>supply chain of Iran fixed communications<span lang="EN-CA"> is modeled through </span>dynamic systems<span lang="EN-CA"> approach. </span>The information and documentation of Telecommunication Company of Iran from 1384 to 1391 and the results of simulation system dynamics model to 1404  has been used to achieve this aim. In order to analyze and determine the identity of the system, the concept of mathematical modeling of dynamic systems is applied. The modeling results show that this system is controllable and observable which means that the system inputs, the system state variables are controlled and each of the state variables of the system can influence the output of the system .Therefore according to thesimulation data, system is stable. https://jimp.sbu.ac.ir/article_87291_74981861c59aa5c1b551b36b741976cf.pdf