What is the primary disadvantage of manual alignment methods?

The primary disadvantage of manual alignment methods lies in the fact that they can be time-consuming and may lack the precision offered by modern technology. Manual methods often involve several steps, such as measuring distances and aligning shafts by hand, which not only requires significant time to achieve the correct alignment but can also introduce human error. In contrast, contemporary computerized alignment tools often provide real-time feedback and can utilize algorithms to ensure higher accuracy with less effort. Therefore, while manual alignment can be effective, its dependence on human skill and the potential for inaccuracies underscores its limitation compared to more advanced alignment techniques.