The ADL Matrix is a strategic planning tool developed by Arthur D. Little to analyze the competitive position of a company's business units. It evaluates two dimensions: 1) the competitive position which can be dominant, strong, favorable, tenable, or weak; and 2) the industry maturity from embryonic to growth, maturity, and aging stages. By plotting a business unit on the matrix according to these dimensions, companies can assess strengths and weaknesses to guide strategic decisions. However, the model has limitations as industry life cycles can vary in length and positioning is not always clear-cut.