@student80,
Perhaps it would be useful for you to explain what you are getting at in more objective terms rather than in an acquainted and subsequently subjective sense. Simply, you need to be clearer in what you want to ask. "Research in management," "Guba and Lincoln, 1994," etc. are, I am sure, very helpful for your own personal reference. However, that does not adequately convey the subject to the rest of us nor give us any common reference point for us all to associate with. Case in point, I have a great deal of interest in propositional and predicate logic. However, the nature of the study is such that very rarely will you ever come across two identical systems (symbolizations, inference rules, etc.). You have to first break down the common rules in order to find where the other person is at so that you can work together to solve the problem. "Positivism" as well as most of the other terms and combinations you use are wildly subjective? so be more specific, especially before providing philosophical fictions (i.e. "is postpositivism like an umbrella capturing several viewpoints whereof?") to elaborate your point.
On that note, what type of positivism are you referring to? I know of at least five types of positivisms including legal, logical, empirical, etc. Under what terms do you use "scientific?" Is this under biological sciences? Critical process sciences? Stuff like this needs to be addressed first.