The article discusses the importance of creating high-quality technical documentation for software products. It explains that the quality of software documentation is determined by its content, presentation, and representation. The ISO/IEC-9126 standard outlines characteristics and sub-characteristics for analyzing and evaluating documentation quality. The key aspects for assessing useful-oriented documentation are functional suitability and quality in use. The article also highlights the structures of documents in program documentation and emphasizes the need for constant monitoring and analysis to ensure documentation is correct, accessible, and informative. Overall, building quality technical documentation is crucial for software development and requires ongoing attention to meet modern quality standards.