Decision Making versus Problem Solving

What is the difference between decision making and problem solving?

"Problem solving can be defined as the process of identifying a difference between the actual and the desired state of affairs and then taking action to resolve the difference."

Anderson, David R., et. al. An Introduction to Management Science. 14th ed. Cengage. 2016

 

From the same title, An Introduction o Management Science, here the seven steps:

Identify and define the problem.