## 1 Introduction  
### Background  
Recently, sensor technology is exponentially growing and the price of many kinds of sensors decreased dramatically. Therefore, it is possible to embed sensors in the collection boxes of reusable products and materials. Furthermore, based on IoT technology, it is possible to use real-time data of the current status of the fulfillment rate of the boxes. This development can lead to the reduction of not only resources such as labor and financial costs but also illegal disposal of waste electrical and electronic equipment (WEEE). Under this circumstance, the quantity of WEEE is globally about 20-50 million tons every year and steadily increased by three to five percent per year ([PERSON] and [PERSON] [1] and [PERSON] and [PERSON] [2]). Because a significantly large amount of the abovementioned waste is illegally disposed, the WEEE directive was appointed as European Law (2003) to block illegal waste disposal in the environment ([PERSON] [3]). In the European inclusive legislation connecting to e-waste in particular, both the WEEE directive 2002 and the restriction of hazardous substances directive 2002 entered into force by the mid-2005 ([PERSON] and [PERSON] [4]). Although the policies were gradually revised, WEEE is still collected and recycled at informal facilities and methods ([PERSON] and [PERSON] [5]). The Republic of Korea hasimplemented a deposit system since 1992, which is a policy related to WEEE ([PERSON] [6]). The Korean government also enforced a similar EPR (extended producer responsibility) in 2003 and assigned the responsibility of environment-friendly collection and recycling of e-wastes to Korean manufacturers and importers (Samsung Global Environment Research Center [7]). The EPR policy is known as the responsibility for the collection and treatment of equipment when they reach their end-of-life status ([PERSON] and [PERSON] [8]). The EPR policy is also environmentally friendly in that manufacturers must consider the post process of WEEE as well as product design processes ([PERSON] [9]). Under the EPR regulation, Korea had limited recycling performances on a total of only 10 mandatory products (refrigerator, air conditioner, TV, washer, computer, audio, mobile phone, copier, fax machine, and printer). In comparison with the EU's 2008 recycling capacity result (6.3 kg/person), Korea's recycle duty rate was significantly lower, even in 2012 (3.2 kg/person). Therefore, the Korean government has strengthened the EPR regulation by including another mandatory 17 S&M wastes (water purifier, vacuum cleaner, dish washer, etc. ), which were the main target items renowned for illegal dismantling since 2014. In response, national target volumes for recycling were presented under the \"enforcement decree of the act on resource circulation of electrical and electronic equipment and vehicles\" (Ministry of environment, Korea [10]). Additionally, the free visit and pickup (FVP) service was introduced in 2012 to help relieve consumers' burden of the disposal of heavy e-wastes to the outside of their residential quarters and to prevent the chance of unauthorized acts of collecting disposed e-wastes, which are eventually dismantled and recycled improperly ([PERSON] and [PERSON] [11]). FVP is a free collection business in which a collection vehicle driver visits a customer's home and collects disposed e-wastes. ([PERSON] and [PERSON] [12]). The customer only makes a reservation for collecting wastes via a phone call or the internet; FVP will go to the customer house and pick up the waste. As a result, the domestic target levels for large-sized recycling e-wastes has been reached throughout the last three years (see Figure 1). However, the Domestic target levels for S&M e-wastes has not yet been satisfied, as shown in Figure 1. Therefore, stronger regulations and advanced management techniques should be applied to the collection of S&M e-wastes. ([PERSON] and [PERSON] [13]).