The PEREAM system is a software engineering environment that supports the design and implementation of object-oriented software components. Software development in the system is accomplished by the continuous evolution of a concept from an early specification to a final implementation. PEREAM supports the ability to incrementally specify software components. It provides for the reusing, browsing, and editing of the software components at any stage of their development history. Concepts in the PEREAM system are modeled with a uniform data structure. The development of the software components is maintained in a graph structure. The concepts are manipulated using the Smalltalk-80 Class Browser or the PEREAM GRAPHICAL EDITOR. This thesis describes the concepts and design behind the PEREAM system and the PEREAM MODELING TECHNIQUE. It also discusses the design and implementation of a graphical editor for the PEREAM environment which manipulates the software components graphically.