The Discipline of Market Leaders (TDML) by Michael Treacy and Fred Wiersema (1997) equips the leadership of an enterprise with a choice of 3 strategies for competing in the marketplace - Customer Intimacy, Operational Excellence or Product Leadership. TDML says you must excel in one of these AND maintain minimum thresholds for the other two. Here is a little web-based management simulation which lets you to test TDML strategies virtually before betting your business on them!