1494 Advances in Environmental Biology, 6(4): 1494-1502, 2012 ISSN 1995-0756 This is a refereed journal and all articles are professionally screened and reviewed ORIGINAL ARTICLE Corresponding Author Mohammad Reza Komari Alaie, Department of Management, Hacettepe University, 06800 Beytepe, Ankara, Turkey. E-mail:komari.reza@gmail.com Effective factors in the existence of waste time and its effects on product system 1 Mohammad Reza Komari Alaie, 2 Mohammad Rasouli Dizaji, 3 Alireza Dadjoyan, 4 Javad Pourtagi Anvarian 1 Department of Management,Hacettepe University,06800Beytepe,Ankara,Turkey. 2 Department of Management, Bonab Branch, Islamıc Azad University, Bonab, Iran. 3 Department of Management, Bostandabad Branch, Islamıc Azad University, Bostanabad, Iran 4 Department of Management, Sarab Branch, Islamıc Azad University, Sarab, Iran Mohammad Reza Komari Alaie, Mohammad Rasouli Dizaji, Alireza Dadjoyan, Javad Pourtagi Anvarian; Effective factors in the existence of waste time and its effects on product system ABSTRACT The purpose of this research is the examination of effective factors on existence of waste time and the effects of that for company product system. This research is Descriptive – Analysis scientific and measurable. The research of statistic society of all of mangers, bosses and administer or specialists of product affairs and product ported of tested company are 650 (people). The capacity of sample statistic is equal of 40 that, is selected by class accidental sampling. The methods of gathering of information in this research are documentary, observing, interview and questionnaire. Also designed on the basis of 5 selection Likert scale. For admissibility of measurement in application, researcher used the admissibility depend on the content. The Cronbach  was equal  =0.81 and it has enough credit. In this research the effective factors on the existence of waste time in collection of material, machinery, tools and human strength are examined on four product system working shop company that involve operatory, enginery, assemble and paintining. The hypotheses of this research are analyzed by one way variance analyses of statistic test. The result showed that the waste time of collection of material, machinery and human strength does have any effect on product System of Company but it has effect on tools collections. Key words: Waste time, Product system, Material collection, Machinery collection, Tools collection and Human strength collection. Introduction As more manufacturers struggle with global markets, competition from low-cost countries and faltering home economies, the attention of many manufacturers has naturally turned to operational costs and waste reduction [19]. The typical approach taken in the past when studying improvement opportunities has been to focus on the manufacturing processes, or the value-added process steps [2]. Conner [2] reported that when lead-time was examined, the two percentages of 470 all energies are spent trying to improve the value-added component of the lead-time, and then the improvement to lead- time would be only 2.5 per cent. Waste can be defined as anything other than the minimum amount of resources which are absolutely essential to add value to the product. Conner [2] defined waste as anything other than the minimum amount of equipment, materials, parts, space, and workers’ time, which are absolutely essential to add value to the product or service. In terms of cost, waste refers to any incurred costs such as inventory, set-up, scrap, and rework that do not add to the value of the product [20]. Flinchbaugh, [8] argued that any goal beyond delivering the right product to the right customer at the right time at the right price is waste. From the perception of end users, waste is internal and external resources that are consumed without adding value to the customers [5]., i.e. if a customer is not willing to pay for them, then their existence is considered a waste. This means that the different types of wastes threaten many facets of performance of the company that customers may value. A systematic and continuous identification and elimination of waste can lead to increased efficiency, improved productivity and enhanced competitiveness. Generally, companies that work towards the elimination of waste in their manufacturing processes realize the following benefits: lower raw material stock and associated holding cost, reduced work-in-process, and lower finished goods inventories; higher levels of product quality; increased flexibility and ability to meet