The purpose of a technical specification document is to provide detailed guidelines and requirements for a project, serving as a blueprint for development. It outlines the technical aspects of a system or product, including architecture, functionalities, interfaces, and performance metrics. Technical specifications facilitate clear communication among stakeholders, ensuring all parties understand the project's goals and technical requirements. They also help in identifying potential challenges early in the development process and assist in compliance with industry standards and regulations. Overall, these documents are crucial for consistent project execution and successful outcomes.