Abstract
SPL (Software Product Line) is known as a set of software systems that share mutual set of features. These features are developed from core assets in a commended way. Testing plays a significant role in ensuring quality of software product for their reuse in future to reduce the development time and extensive testing of the similar product persistently. Testing a product line is very tricky and challenging. It has gained reflectivity in the development process as quality issues are rising significantly for software development organizations. The research proposes a systematic testing technique which uses Factor Interdependency Graphs (FIG) to test the product lines in order to ensure early defect detection, fault correction and to find common set of testing assets for the subsequent products of the SPL.