In Data Science, a variety of advanced technologies like data mining, statistics, predictive analytics, AI, and machine learning are used in conjunction to deliver solutions for business problems.
In Decision Science, analyzed data is “interpreted” to arrive at business decisions that meet specific objectives.
So while Data Science involves collecting and analyzing business data, Decision Science involves the process of making decisions through interpretation of data. However, the “interpretation of data” is generally conducted by applying mathematical models and algorithms.