By Preston McSwain, Managing Partner and the Chief Investment Officer of Fiduciary Wealth Partners. : A thoughtful process is an important part of any investment approach, but it is especially crucial with private investing, given the illiquid nature of the investments, the multi-year commitment required, and the limited rights and transparency often afforded investors (Limited Partners - LPs) in a private investment fund. Private investment due diligence questionnaires (DDQs) have been developed for institutional investors but they are often long and can be quite technical.