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Business competition in the service sector in Indonesia makes the queuing model very important. This paper aims to find the optimal queuing model at the XYZ counter area service. The average customer arrival time in the ongoing XYZ model simulation with only one entry is 34.1 seconds. With three queue lines and three cashiers each accommodated with ten samples, the duration of service for each cashier independently is 61.4 seconds, 53.2 seconds, and 68.4 seconds. The number of customers served is 4 out of 16. This fact shows that this queue is not adequate for optimal service. The researchers made two simulation models for counter row reduction in this study. First, the researcher made two entries, four queue lines, and four counters. The number of customers served is 24 out of 67, which makes the first model has an effectiveness of 35.82%, which is more advanced than the effectiveness of the current model. Second, the researcher makes one entry, one queue line1, and one counter1. The number of customers served was 5 out of 16, making the alternative model 31.25% effective, which is also ahead of the current model. [ABSTRACT FROM AUTHOR]

Back Support 2 in 1 product design is done to help relieve back pain and also improve one's posture. One of the diseases of the back that can occur is LBP (Low Back Pain). Lumbar back support is often used in low back pain pain and is also a common intervention effort in the industry to prevent back injuries. This product is equipped with an innovative TENS (Transcutaneous Electrical Nerve Stimulation) tool. TENS therapy has been shown to reduce various types of pain within 15-30 minutes. TENS is able to activate nerves of large and small diameter which will send various sensory information to the central nerve. The purpose of this research is as a method used in making 2 in 1 Back Support products that have good quality and have functions that can meet the expectations and needs of consumers or product users. The method used in obtaining data to design a 2 in 1 Back Support is the Nigel Cross method. The results of this study indicate that the technique is easy to work with. Where all the technical boundaries are important and detail for the product. [ABSTRACT FROM AUTHOR]