ESE (Experimental Software Engineering) represents one of the research and development groups of LENS – Laboratory of Software Engineering of the Systems Engineering and Computer Science Program at COPPE/UFRJ. It aims at improving software engineering through applying experimentation (scientific method) for the construction and evaluation of software technologies (processes, methods, techniques and tools). ESE also concerns with the field advance, by researching and proposing models for the planning, execution and packaging of primary and secondary studies in software engineering. ESE group believes these are fundamental activities that will contribute to get software engineering more closed to the classical engineering and scientific principles.