In order to allow software organizations to reuse their know-how, the authors have defined product patterns artefact. This know-how can be used in combination with software engineering best practices to improve the quality and productivity of their software projects, as well as reduce projects cost. This paper describes the structure of the Process Assets Library (PAL), and the framework developed to encapsulate the know-how in organizations. The PIBOK-PB (Process improvement based on knowledge-pattern based) tool uses the proposed PAL to access the knowledge encapsulated in the product patterns, and to execute software projects more efficiently. This paper also describes PIBOK-PB's features and compares similar tools in the market.