Controlling is an important phase in any project. Earned Value Method (EVM) is one of the popular methods used in controlling a construction project. Safety management is an important management function and needs to be controlled efficiently on a project. Safety statistics should be reported in the same manner as cost, schedule, and quality. In EVM, cost schedule index (CSI) is calculated on the basis of cost performance index (CPI) and schedule performance index (SPI) only. We present a conceptual model to determine construction safety index of projects and propose a new total performance index linking it with CPI and SPI. This index represents the performance of cost, schedule, and safety management of a project. This new index can be named cost schedule safety index (CSSI) or total performance index (TPI). The new index should prove to be helpful to different stakeholders in understanding the project performance in a holistic manner.