Instead of using behavioral questions in initial calls, Salas O'Brien views the entire three-month diligence period as the real interview. How a target's leadership responds to the inevitable challenges that arise reveals more about their character and working style than any prepared answer could.

In a non-control deal, an investor cannot fire management. Therefore, the primary diligence focus must shift from the business itself to the founder's character and the potential for a strong partnership, as this relationship is the ultimate determinant of success.

During diligence, speak directly with the target's largest clients. You may uncover deal-breaking risks, such as a client who will leave post-acquisition because their internal rules prevent reliance on a single, monopolistic supplier, a fact you would otherwise miss.

An acquisition target with a valuation that seems 'too good to be true' is a major red flag. The low price often conceals deep-seated issues, such as warring co-founders or founders secretly planning to compete post-acquisition. Diligence on people and their motivations is more critical than just analyzing the financials in these cases.

Despite extensive online and third-party checks, Jacobs considers multi-day, in-person interviews with the target's senior management to be the most crucial part of due diligence. This direct interaction is essential for uncovering hidden risks, opportunities, and the intangible "skeletons" that don't appear in financial statements.

A rising tide lifts all boats. The true test of a founder partnership emerges during downturns. Diligence should focus on teasing out traits like adaptability, humility, and accountability, which predict how a founder will react when plans inevitably go awry.

Instead of hiring based on network or general talent, Applied Intuition's founders strategically assessed the biggest technical and knowledge risks facing the company. They then hired their first employees specifically to mitigate those existential threats.

Instead of a bloated checklist, Milliken focused its diligence for its largest acquisition on four critical questions tied directly to the investment thesis. This allowed a team of 100+ to prioritize efforts, "fail fast," and avoid analysis paralysis on the path to a go/no-go decision.

PE firms often focus on the value creation plan during underwriting but neglect talent assessment. Evaluating the existing team and planning for development or replacement *before* the deal closes leads to better outcomes and avoids later surprises.