The success of the software development highly appreciated with the intellectual capital instead of physical assets of the concern. Human resource is the challenging resource in the software development industry to meet the customer requirement and deliver the project on time to the client. The software industry requires multi-skill and dynamic performers to meet the challenges. The skills domain knowledge and the developer�s performance are considered as the potential key factors for the success of the delivery of projects. The developer�s performance is influenced with cognitive factors and its measures. This study aimed to relate developer�s performance in the software industry with his/her cognitive workload. The various statistical measures like correlation, regression, variance and standard deviations are to be calculated for the developer�s performance with the cognitive load. The real-time development sector observations made of around 250 employees, 15 projects work and its corresponding cognitive load such as physical ability, mental ability, temporal ability, effort, frustration and performance in Web application, Database application and Multimedia. This paper provides the measurable analysis of the development process of the developers with their assigned task using statistical approach