Goal and scenario-based feature identification techniques from legacy system

Since many existing systems have been still working even these system have several problems in extending or maintaining. This is big obstacle for company to adopt the product line engineering. Extractive approach can be alternative approach when the company has their own system and adopt product line engineering. In extractive approach, commonality and variability modeling is critical also. In this paper, we suggested feature identification techniques using user interface and scenario-based analysis based on goals. With user interface scenario we can identify the features and we can group the features and make the hierarchy among the features with goal-based analysis.