چكيده به لاتين
Abstract:
Always necessary in a competitive market that has been of interest to managers and contractors , at the same time reducing cost and time to do the project or at least stabilizing the production and quality of projects and services . Building industry, one of the biggest industries, especially in developing countries like Iran .That a large number of enterprises and institutions in the service and manufacturing sector data, with the growing trend in the construction sector. On the other side, managers in this sector has been forced to follow these problems, because the speed of growth in today's world of high technology and personalisation. So it's something that is important in today's competitive business market is increase profits, subtracting the cost of goods and cost of production.
Value engineering purposes in the construction industry include: better use of financial resources, reducing the cost of projects, identifying those that might come from operations that are designed, according to retain the core functionality in the activities of qualitative and quantitative, help to justify the implementation of some projects through reform practices, prevent irreversible loss of resources such as energy and helps to reduce the cost of construction projects in today's competitive market.
In this dissertation, paid to evaluate an important part of building that is cover and steep roofs. The reason for choosing the wrong type of roof is lack of sufficient awareness of roof coverings from contractors, knowing the issues and factors affecting the choice of suitable roof coverings, knowing the negative impacts and positive climatic conditions on the types of roof coverings and … . Accordingly, directly realize the negative effects Consumers and the higher the lower the quality of the country's construction industry. Unfortunately many of contractors think so pay later,use better product quality. The expression, there is no scientific perspective and assess the precision engineering and proof of that is attributable, at least in this category.
In this dissertation, tried with to the technical and economic examination and evaluation of coatings for roofs and recognition of the diversity of weather climates in different geographical areas of Iran, introduce the best and most suitable type of overhead cover,with using the concept of value analysis.
Keywords: Roof covering, Value Engineering, Cost and time, Climate and weather in Iran
