المؤلفون
الملخص
This research aspires to build mathematical linear models to midland refineries company ( representing the production capacities & current levels ) in its variety ( gasoline , kerosene , aircraft fuels gas oil , fuel oil , liquid petroleum gas & store oils ) as they represent important products in everyday life & the continued & growing on them .
To achieve optimum use of available economic resource , which effects the optimal planning for that resources , should use mathematical techniques in preparation of optimal plans , and one of these methods ( parametric programming ) which is used in the analysis of mathematical models within the field of operations research . After building mathematical models for midland references company then analyzing the impact of Simultaneous changes that will occur to those energies by using a specific factor (θ ) which will change some of the models features & will get on the areas of stability , including the optimal solution will enjoy with a stability ( to achieve optimality & feasibility within the period θ ) And this will allow flexibility entrance on the outcomes & measure these flexibility either in the objectives function coefficients ( such as a change of sale prices or costs ) or a change in the right hand side of constraints ( the size of production capacity or marketing ) or both of them , And this is what we are dealing with .
And according to the results obtained from the solving of these parametric models by using expanded program prepared by the researcher in a language ( Visual Basic ) .
Will to appear us alternative optimal production plans, you can rely on one of them to fill the shortfall in some petroleum products, and surplus inventory, through a balancing between the amounts of production (by the adoption of the plan) and the consumption rates of the provinces who cover by the company. Or to adopt one of them (as a future plan) in the light of the consumption expectations of the determine the projects required in future to meet the expected local consumption requirements and to advance at the level of the oil developed countries.
الكلمات الرئيسة
)