We have developed a quality model of an Information System Procurement Specifications (ISPSs). The model is called the ISPS-Q Model. Our aim is to improve the quality of ISPSs for the improvement of procurement operations. The government and/or municipal offices request comments on an ISPS from the public before they open the ISPS to companies. The public comments are referred to in an attempt to further improve the quality of the ISPS. In order to evaluate the efficiency of the ISPS-Q Model, we obtained the public comments and their target ISPS for analyzation. As a result, we could clarify that most of the public comments were written with ambiguous words and/or incomplete statements. Furthermore, we could no regard these ambiguous and/or incomplete comments as a means to improve the quality of the ISPS. In this regard, the ISPS-Q Model is essential to the improvement of the quality of ISPSs. The ISPS-Q Model was developed by adding fair and deleting modifiable to IEEE Std. 830-1998, since fair is a property that the government requires of every ISPS, and that the ISPSs would never be changed after their procurement. We applied the model to a real ISPS and evaluated the quality of the ISPS. We found 19 problematic statements in the ISPS. Multiple companies submitted 109 comments regarding the same ISPS. In this paper, we discuss the differences between our comments and the public comments made by the companies. After that, we define new quality characteristics and reconstruct the ISPS-Q Model. We will close this paper by showing the revised ISPS-Q Model.