 Huthwaite
Huthwaite has emerged as the leading sales performance and change management firm in the world. Building upon our prestigious research legacy, broad subject matter expertise, and success-based sales models—including SPIN Selling® and the Buying Cycle™—Huthwaite has developed a proven approach to change management based on a process of continuous organizational improvement.
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 Miller
Heiman
Miller Heiman has researched the sales process, defining and documenting what makes successful selling.
They found that successfull selling is based on fundamental and repeatable processes.
The core programs, Strategic Selling® and Conceptual Selling® have helped sales organizations across the globe by providing them a refined, systematic approach into the art of strategically managing complex deals.
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