Business applications that share a common architecture and a set of reusable components, implemented by the Software Product Line (SPL) approach to software reuse, can benefit from handling the variability with extensive use of architectural design patterns. Use of the patterns within the Product Line Architecture (PLA) frameworks, yields a number of benefits toward the improvement of maintainability of the applications which are part of a SPL family. This paper presents use of the Strategy pattern within PLA as a preplanned variability enabling mechanism for SPL.