This document provides guidance on writing an effective business plan. It discusses that a business plan is typically 25-35 pages and serves both internal and external purposes. There are two primary audiences: a firm's employees and investors/stakeholders. The document outlines the key sections of a business plan, including an executive summary, industry and market analysis, company description, marketing plan, financial projections, and appendices. It emphasizes that the plan should be concise, clear, and follow a conventional structure to communicate the merits of the new venture to outsiders.