Final answer:
Focusing on short-term profits is one guideline that does not assist managers in establishing global brand leadership, as a long-term perspective is critical for success.
Step-by-step explanation:
Guidelines which can assist managers in their effort to establish global brand leadership exclude focusing on short-term profits.
A manager should indeed develop a strong brand identity, adapt marketing strategies to local cultures, and build strong relationships with customers when aiming for global brand leadership. However, a focus on short-term profits is usually not recommended since establishing global brand leadership typically requires a long-term perspective and investment.
Brands with a firmly established name like Coca-Cola and Pepsi have shown that consistent product quality and protecting their brand are crucial for long-term success. These actions foster a national and even global reputation, indicating that sustainable practices are important for brand leadership.