Diagnose before you shop. Write one paragraph on each of your last five closed deals covering who brought it in, how long it took, and what the relationship history was. Then score your company on execution discipline and revenue concentration. Low execution discipline points to EOS. High concentration in your top ten customers points to a relationship-driven operating system. A strategy or cash problem points to Scaling Up. Then pilot the choice with one team for 90 days before rolling it out.