Atefeh khosravi - University-Tehran Northern Branch, Tehran, Iran
Nasser Modiri - Islamic Azad University of Zanjan, Zanjan, Iran

The main goal of producing a software application is to support requirements which the software is designed for. As a software supports stakeholders’ requirements more complete and accurate,it will become more successful and accepted. Requirement Engineering emerged to manage these requirements. Requirementengineering discovers, models and specifies and documents these requirements for a system and its domain and by validating themabsorbs stakeholders’ satisfactions. But what are the prerequisites to go through this process? In this research we will mention someof important RE prerequisites and we will discuss about prerequisites of each classic RE phase separately

Requirement Engineering, RE, Prerequisites of RE, Applying RE