This paper presents the Document Management Systems (DMS) as a support decision tool to optimize Toyota Caetano Portugal S.A. (TCAP) processes performance. The created systems were developed on the best practices of a Business Project Management (BPM), for better structural implementation. The first system implementation was related to the warehouse materials requirement process, where an excel template with VBA functions for fill automatization was built. It had a reduction of the overall paper consumption and time execution optimization, which means the gain of approximately of 0,10€ and 2,09€ per unit produced, respectively. It was also obtained an elimination of 4538 paper sheets per year. A second system was also developed, in order to provide a Decision Support System (DSS) for documental management. Several User Forms were developed in VBA code in order to provide a flexible and intuitively user interface experience. It reduced the users time decision making and the administrator maintenance, by a total of 26 minutes, corresponding to a 1,61€ reduction per unit built, which means an efficiency increase of 42%. The present work fits in the company's strategy for a more sustainable environment being a positive driver of Industry 4.0 implementation.