While several companies may share a parent co., the people and their design philosophies are not automatically indiginous to each other. The co. I work for owns several different subsidiaries, none of which has a clue as to how we design our products. I routinely spec. components from our "Sister" companies, never needing to fully understand how or why they were designed, only that they will give me the desired service factors. I would never need to know how to design a bearing, for instance, yet I know one or more exists that will fill my design goal. A parent company exists to own sub-companies which are profitable and may be able to work in tandem to solve certain problems thus creating more profitability.