The document presents a post-merger integration toolkit developed by former consultants from McKinsey, Deloitte, and BCG, aimed at improving the value creation of mergers and acquisitions (M&A). It outlines the advantages and disadvantages of organic growth versus M&A strategies, highlighting the high failure rate of M&A largely due to poorly managed post-merger integration phases. The toolkit encompasses a comprehensive 3-phase approach including strategy definition, detailed planning, and implementation, providing frameworks, tools, and templates to facilitate successful integration.