Architecture design is the first, and most fundamental, stage that addresses the achievement of quality requirements
for systems such as Smart Garage Door Opener (SGDO) system. Hence, this paper discusses the understanding of
Attribute Driven Design (ADD) method for designing the high level architectural system design for a product line
of SGDO system. We present two decomposition stages of ADD method to fulll functional, quality, and business
requirements at a level of abstraction that allows for the necessary variation when producing SGDO system.