Types of POE

Most of the literature reviewed tends to analyze and arrange this proliferation of methodologies on a thematic basis. For example, Preiser (1995) identified three approaches that summaries the range of POE that can be applied to the full spectrum of projects, from the minutiae of a specific building, to the overall procurement programme of a whole project. These three approaches are summarized as: Indicative, Investigative and Diagnostic POE and it is exhibited under table 2.3

Types of POE

Level of POE	Aims	Methods	Time Scale	Comments
Indicative	Assessment by experienced personal to highlight POE issues	Walk through evaluation Structured Interviews Group meetings with end – users General inspection of building performance Archival document evaluations	Short inspection period	Quick, simple, intrusive/disruptive to daily operation of building. Judgmental and overview only.
Investigative	In- depth study of the building’s performance and solutions to problems	Survey questionnaire and Interviews Results are compared with similar facilities Report appropriate solutions to problems	From one week to several months	In depth/ useful results. Can be Intrusive/time – consuming, depending on the number of personal involved.
Diagnostic	Show up any deficiencies (to rectify) and collect data for future design of similar facilities.	Sophisticated data gathering and analysis techniques. Questionnaires, surveys, interviews and physical measurements.	From several months to several years	Greater value in usability of results. More time consumed