What are the consequences of the saying "garbage in, garbage out" in the context of data analysis and decision-making processes?

The saying "garbage in, garbage out" means that if the data inputted into a system is of poor quality or inaccurate, the output or results will also be unreliable or flawed. In the context of data analysis and decision-making processes, this means that using faulty or incomplete data can lead to incorrect conclusions and decisions. It emphasizes the importance of ensuring the accuracy and quality of data to produce reliable and meaningful outcomes.