| 摘 要： | The paper is based on a research which tries to explore, explain and develop a framework that would be used in the sustainable post-construction management of public housing estates. Literature review provides evidence of the extent of unoccupied, unfinished, vandalized, and abandoned social housing estates in the Niger Delta region of Nigeria, signifying that the availability and management of decent public housing estates in the Niger Delta of Nigeria are lacking because the post-construction management practice is not as good as it should be. The aim of this paper is to assess and set out the methodology and rationale for adopting a strategy to the research. It further, thus, examines case study design strategy that follows exploratory and explanatory methods and other research worldviews as alternatives in philosophy, approach and in research methodology. In addition, the paper draws out the significance of pragmatism as current practical world thinking that is a better answer to a research study aim, objectives and questions which focus on real-life situations. It argues that the development of a framework for use in the post-construction management of social （public） housing estates in a sustainable manner is needed; and that, using a pragmatic philosophical perspective and approach of worldview through a mixed method （qualitative and quantitative） in a case study design line of inquiry in the research methodology would be a better proposition to adopt in the study. The paper recommends that the issues of sampling, validity, reliability, the relationship between the researcher and the subject and other research quandaries are vital when deciding on an appropriate method.
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