Simplify the following text for a Grade 11 native English-speaking person.
Original: The BCG matrix ( aka B.C.G. analysis , BCG-matrix , Boston Box , Boston Matrix , Boston Consulting Group analysis , portfolio diagram ) is a chart that had been created by Bruce Henderson for the Boston Consulting Group in 1968 to help corporations with analyzing their business units or product lines .
Simplified: The growth-share matrix ( aka B.C.G. analysis , B.C.G.-matrix , Boston Consulting Group analysis ) is a chart that had been created by Bruce Henderson for the Boston Consulting Group in 1970 to help corporations with analyzing their business units or product lines .