Although the project-based studies are also often from the point of view of the researcher, it is clear that the perspectives are often practitioner based, i.e. the point of view represented by the researcher is that of the organization, the -ger, the developer, etc. The object of study is often the software processor product in some form. If we are looking at breadth, there have been an enormous variety of objects studied. The object set which once included only small, specific items, like particular programming language features, has evolved to include entire development processes,like Cleanroom development