It is one of the main assumptions of production function, that the technique of production should not be varied. This is because, the production of goods is affected by the level of factors, along with the dependence on production technique. Better techniques result in better production of goods. When the technique is of lower grade, without even decreasing the level of factors, the production can be decreased. And that is why, with a definitive technique of production function, it can be said that what will be the effect on the level of production with the variation in level of production means.
