The document provides guidelines for implementing the Constructors' Performance Evaluation System (CPES) for infrastructure projects in the Philippines. It outlines the objectives of CPES as establishing uniform criteria for evaluating constructors, creating a centralized database of contractor performance ratings, and ensuring infrastructure projects meet requirements. It describes the roles of different entities in CPES including Constructors' Performance Evaluators who conduct evaluations, Constructors who develop corrective action plans, and the CPES Implementing Unit which manages the process. The guidelines include detailed procedures for how contractor evaluations are conducted during and after project completion and how information is reviewed, reported and disseminated.