Helen Morabi heravi - PhD student, department of environmental, Faculty of environmental management, Malaysia, University of UPM, e-mail: helen.morabi@yahoo.com institution
Mohd Bakri Ishak - Associate professors, Department of environmental, Faculty of environmental management, Malaysia, University of UPM
Ahmad Makmom bin abdullah - Associate professors, Department of environmental, Faculty of environmental management, Malaysia, University of UPM
Mohammad Firuz ramli - Associate professors, Department of environmental, Faculty of environmental management, Malaysia, University of UPM
Mohamad reza Sabour - Associate professor, Department of Environmental, Faculty of Environmental Engineering, K.N.Toosi University

Recyclable material collection systems were designed for the residential sector in Tehran, it is critical to understand what can be efficiently recovered from the waste stream of each establishment. Temporary containers, such as cardboard boxes, plastic bags and a range of different types of containers are often used. Currently, about ۸۵% of waste collection and transportation is being finished by the private sector. The amount of the source separation capita generated by curbside sorting ۶۹ kg/householder/year (۳۵%), door-to-door service ۱۱۲ kg/ householder/ year (۵۵%) and buyback center ۱۸ kg/householder/year (۱۰%). It seems to be the main reason that the majority of people chose for collecting and separating waste is to earn money from it and the majority of the respondents in door-to-door service is only prepared to spend less than ۵ minutes reaching the waste disposal location. The scavengers mostly preferred tanks at the curbside because of offset the costs of collecting and easily available of tanks. The product control function provides guidance not only to upcoming product developments, but also to existing products/ capabilities to be maintained on a base. In this matter, product control function drives product accountability within key stakeholders focusing on delivering solutions (vs. product) in an efficient, compliant and controlled way As part of the product maintenance process, the product control manager is accountable for: Facilitate product managers to have full visibility of their product processes and controls , ,Ensure procedures are end-to-end, up-to-date, align to risk policies and outline risk tolerances ,Support process to ensure compliance with internal policies and quality control .

Source separation; Door-to-door service; Buyback center; Door-to-door service