The document discusses the GE Nine Cell Matrix, which is a portfolio analysis tool developed by McKinsey & Company for General Electric in the 1970s. It evaluates business units based on their market attractiveness and business strength. Market attractiveness depends on factors like market size, growth rate, and profit margins. Business strength is assessed by metrics such as market share, brand strength, and competitiveness. The matrix plots business units into nine cells that indicate whether a unit should be invested in, maintained, or harvested. It provides a more nuanced analysis than the Boston Consulting Group matrix.