الفهرس 
Chapter 1 “Introduction”Only 14 pages are availabe for public view
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Abstract
Low cost housing projects are directed to serve low income people. Egypt faces an increase in population, so the housing habitation problem is considered one of the challenges that face the society. Although, there has been significant progress in the formulation and implementation of housing policies and to some extent strategies in the past decades, many management constraints still effectively hinder progress in housing development. On the other hand, Value Methodology is the most commonly management techniques used and refers to the comprehensive body of knowledge related to improving value regardless of the area of application. Construction work in this type of projects occupy 40:50% of the total cost and this percentage increasing until
reached to 70% in case of canceling partition or interiors finishing, so Value Methodology is primarily concerned with economic and functional value on construction work level. Various construction systems have been applied in building low cost housing in Egypt. The forming weighted evaluation matrix to evaluate the selection of applicable construction systems for major low cost housing projects in Egypt helps government agencies and/or contractors in three main functions 1) synthesize structural idea, advantages and disadvantages of various construction systems, 2) determine criteria that may influence selection of construction system and their
relative weights or degrees of importance are established, 3) select feasible construction systems for development into specific value improvement. The weighted evaluation matrix is also flexible with respect to the type of input data pertaining to 95 construction systems. It includes three main elements (1) construction systems (2) evaluation criteria (3) rankings of construction systems. Traditional, semi-developed and developed systems are typical construction systems that are used for habitation units. Traditional system encompasses four subsystems which are cast-in-place-solid slab, flat slab bearing brick wall and bearing reinforced block wall and semi-developed system include two sub-systems which are katzenberger and semi pre-cast wide slab. Also, developed system includes two subsystems which are tunnel form and coffor. An extensive search has taken place for the criteria that may influence
selection of construction system of low cost housing. Preliminary lists were collected from the two sources: literature review and unstructured interviews with
professionals. Six interviews have been conducted; in addition to, other several unstructured interviews but with no direct impact on the preliminary list of factors. The most important criteria considered in this evaluation matrix include construction cost, resource availability, maintenance, finance, implementation time, service life, design efficiency, and ease of construction. Definitions of all criteria are listed in to avoid any confusion that might occur. After, considering the 8-criteria list, a process of acquiring the importance of criteria been performed through a small sample questionnaire, 31construction engineers were asked to review the aforementioned 8-criteria for their effectiveness in evaluating the economic and engineering performance of low cost housing projects. All of the engineers believed that the criteria were adequate for achieving that
purpose. They were then asked to rank the eight criteria according to their relative weight, or degree of importance, in evaluating the construction systems. The pairedcomparison technique was used for this purpose. The raw weights so obtained were then normalized.