In that sense, the operational capabilities of a firm should be viewed as a portfolio of resources that adapt to changing product needs and / or customer service. The strategy is individual operations, specific to each company, but we can enunciate some general trends, according to age and country, in a historical perspective. For example, in the U.S. in the years after World War II, companies experienced a strong demand from its customers, which had remained unsatisfied demand during the war, so its operating strategy geared towards mass production of standardized goods. During the same period, Japan, in its need to regain foreign markets to guide their operations strategy to optimize the relationship between quality and cost.