Journal of Intelligent Computing Patra Thitisathienkul, Nakornthip Prompoon 5 4 2014 http://www.dline.info/jic/fulltext/v5n4/1.pdf Developing the software product that meets with customer’s actual needs is a major objective of software development. Due to this reason, the appropriate Software Development Life Cycle (SDLC) is selected and performed. There are various kinds of documents specified in natural language delivered from each SDLC and are used to communicate among involved parties. However, characteristic of natural language itself may bring ambiguity and verifiability issue while the inappropriateness of document structure often causes the difficulty in document modification. All three issues may cause interpretation problem and customer’s needs misunderstanding. To mitigate these problems, this paper proposes SDLC documents quality assessment method based on its characteristics which focus on two aspects; document contents and document structure. Measurement process model and measurement information model are applied as a guidance to propose the method. Software Requirements Specifications (SRS) document was used to illustrate our proposed method as a case study. Moreover, the functional requirements and the architectural design of a software tool which embedded the proposed method are presented. The result of applying the proposed method can indicate the quality level of SDLC documents which leads to quality improvement. The reviewed and improved SDLC documents can enhance the quality of communication among stakeholders and be stored as a lesson learned that can be applied for the future similar situation.