How is corporate parenting different from portfolio analysis? How is it alike? Is it a useful concept

Question:

How is corporate parenting different from analysis? How is it alike? Is it a useful concept in a global industry?

Portfolio
A portfolio is a grouping of financial assets such as stocks, bonds, commodities, currencies and cash equivalents, as well as their fund counterparts, including mutual, exchange-traded and closed funds. A portfolio can also consist of non-publicly...