Software reuse has received considerable attention as a technique for aiding software designers. One mechanism for increasing the efficiency of reuse is component adaptation, particularly when designing large and intricate systems. Component adaptation composes reusable components in an architecture to produce a new system. Specification slicing is a method for decomposing complicated systems into manageable sub-components, where each sub-component captures an independent behavior of the system. This paper outlines specification slicing and its application for reuse using the parallel adaptation architecture.