Steve Derezinski continues MIT's course 15.393, Nuts and Bolts of New Ventures, with a session on building financial projections for a startup. Drawing on his own business experience, he walks through the techniques founders use to forecast revenue, costs, and cash needs before a venture has real financial history to rely on. The session is aimed at early-stage entrepreneurs preparing materials for investors or internal planning, treating projections not as guesswork but as a structured exercise tied to assumptions about customers, pricing, and growth. As part two of a longer session, it builds on prior discussion and focuses squarely on the mechanics of putting numbers to a business plan. Runtime runs 81 minutes, giving Derezinski room to work through the reasoning behind the numbers rather than just presenting a template.