Optical Burst Switching (OBS) is an important concept in next-generation optical networks, which trades off the granularity constraints of Optical Circuit Switching and Optical Packet Switching. BS The burst assembly mechanism determines the performance of OBS critically, combining client packets into transmission bursts. The current paper includes a critical review and quantitative analysis of three basic assembly methods: Time-Based, Length-Based, and Hybrid Adaptive. We show, by mathematical modeling, algorithm development, and simulation findings, that both of the two approaches to threshold exhibited limitations inherent in all of them: Time-Based assembly is delay-bound but inefficient in burst sizes, and Length-Based assembly is efficient but has the unlimited delay-bound. A hybrid Adaptive scheme addresses these shortcomings by adapting the parameters of the assembly on the fly, depending on the conditions of the network. Intelligent adaptive schemes in simulation actually lead to the reduction of Burst Loss Probability by 40-60 percent in comparison to the methods that are not smart, and the delays remain below 8 ms. Moreover, we compile the data performance of previous research papers and research how adaptive methods are changing towards the methods based on machine learning. In conclusion, it is found that adaptive assembly is a necessity to make a practical OBS deployment, and future research efforts should be directed at lightweight machine learning models and compatibility with new network architectures...................