One important factor in inventory control is measured using the variance of the daily demand for the product. A management scientist has developed the optimal order quantity, assuming that the variance is equal to 250. Recently, the company has experienced some inventory problems, which induced the operation manager to doubt the assumption. To examine the problem, the manager recorded the daily demands for 12 random days. The data is in Table 1.

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Polynomial Time

The problems for which the deterministic polynomial-time algorithm exists belong to the complexity class (p) and it is central in the field of computational complexity theory. According to Cobham’s thesis, polynomial time is a synonym for “feasible”, “fast”, and “efficient”.