Mergers and acquisitions often fail to create value due to data complexity and subjective opinions rather than objective data insights. Most M&A deals do not deliver sustainable added value, with 70-90% failing according to research. For M&A to succeed, organizations must address data complexity early on by improving data accuracy and management through tools like analytical appliances and cloud processing to unify and validate data for strategic decision making. Only with high quality, unified data can the anticipated synergies of M&A deals be fully realized.