Abstract :
Decision making plays an important role in economics, psychology, philosophy,
mathematics, statistics and many other fields. In each field, decision making consists of
identifying the values, uncertainties and other issues that define the decision. In any
field, the nature of the decisions is affected by environmental characteristics. In this
paper, we are considered the production planning problem in a stochastic and complex
environment, i.e. the environment of electronic equipment production, where planning
is faced with variable results and changeable requests. In this complicated environment,
we are encountered with joint replenishment, variable yields and exchanging demands
and many other complex variables related to inventory management and control systems
that have complicated and unpredictable behavior and could not be modeled in a simple
way. We are trying to model this environment as a stochastic problem. The aim of
mathematical model is managing and controlling inventories in such a complex
production environment. We also try to solve the proposed stochastic problem by
estimation procedures. The planning problem is devised as a gain-maximizing
stochastic program. Also we use two mathematical and simulation software to predict
the behavior of production system in various situations. The results of simulations are
mentioned in the paper.
