## 2 Synchronization Issues with Various Part-to-Picker Systems and a Literature Review
### Synchronization Problems in Hospitals
In Vietnam, hospitals frequently use suspension lines and pneumatic tube transport systems, while airports frequently use conveyor belts. It is crucial to prioritize the development of transportation systems within industrial plants and hospitals. Extensive discussion of airports is unnecessary, as their significance lies primarily in logistics. Therefore, the establishment of MSMSS in Vietnam will be guided by this evaluation as a fundamental basis. And this is particularly in utilizing the available overhead space in factories, warehouses, airports, and hospitals to mitigate transportation issues associated with material movement. The multiple-station automatic transportation system (ATS) is the proposed solution for the expectation of this field in Vietnam based on the literature review. This ATS would ensure that nations like Vietnam, which still has a manufacturing sector with severe restrictions, can achieve it independently. The solutions for human resource development of mechanical enterprises in Vietnam were presented at the 9 th International Conference on Socio-Economic and Environmental Issues in Development, NEU-KKU, 2018. The Vietnamese mechanical industry has been exposed to a number of limitations such as outdated technologies, a lack of domestic raw materials, and human resources. Insufficient management effectiveness, challenges in raising capital, developing markets, and competition also have an impact. Managing multistation freight in-door transit is an obstacle in Vietnam, but one of the pioneering solutions to address it is to use one of the pioneering solutions. An innovative solution to the automated freight issue is provided by the proposal. A mechanical setup with overhead conveyors and active line-switching devices is used in this approach to switch lines heading to various stations. Using RFID technology that is currently available and under ideal production and manufacturing settings, this system may be utilized in Vietnam. In addition, the method ensures local manufacturing, decreases labor costs, and simplifies maintenance. The controller, the signal processing block, the information management block, the logic technique for route planning and container distribution, and other elements of this ATS design could all be thoroughly discussed in future studies. Warehouses and hospitals in Vietnam are very old and were built decades ago, especially large institutions like Cho Ray Hospital or Hospital of Traumatology and Orthopaedics. The intensive care unit (ICU) is a hospital department that provides specialized medical care to patients who are critically ill. Since the state of disease is diverse, the number of pharmaceuticals arising during treatment is significant. In the process of dispensing and receiving drugs at the department of pharmacy, there are numerous administrative procedures that require time to prepare drugs. In particular, when a patient needs drugs during treatment, the process will follow these steps. Step 1: the doctor composes the prescription; Step 2: the nurses carry out the medical orders; Step 3: the pharmacy staff enters the prescription into the device. Then, the staff will call the warehouse to approve the slip and print the signature form with the treating doctor and the head of the department. After transferring the order to the pharmacy departments, the ICU staff give the nurse the drug back to complete the order. It is a challenging task to give medication to patients who require emergency treatment. According to Circular 03/2018/TT-BYT published by the Ministry of Health of Vietnam on dated 9 February 2002, The Good Drug Distribution Practices require drugs to be stored and transported according to mandatory procedures. The first thing to do is to not lose information that aids in identifying the product. The product is not contaminated or adulterated by other products. Third, preventative measures are taken to prevent medicinesfrom being spilled, broken, embezzled, or stolen.