... equations which are then solved by a commercial LP package using the simplex algorithm, The model output is an annual production schedule which will maximize cashflow while considering the system's characteristics and constraints as well as product prices, fixed and variable operating costs, royalties...

... and market areas. Thecompetitive model of price determination would argue that within any producingarea there should be a tendency for prices of equivalent termed gas (i.e. spotor firm contract) to equalize. Since deregulation the major impediment to thisprocess has been the constraints to market access...

... are designed empirically or conceptually to apply appropriate transformations to input data. The results are steered to match the process or object under study or to reconstitute options under varying conditions. Further distinctions can be made among models by degrees of linearity, stability, constraint...