I’m trying to understand what the term Customer Decision Hub really means?
Customer Decision Hub is a software offering by Pega that is a combination of data management (including big data), decision management (including capabilities such as Next-Best-Action), advanced analytics, and omnichannel execution facilities. This offering is available in the cloud or on premise. More Information including further descriptions, case studies and ebooks are available on pega.com https://www.pega.com/products/pega-7-platform/decision-hub
Does it replace the Decision Strategy Manager or Decision Management terms?
Terms are not replaced, as they often remain in historical materials. Here is the best way to answer this question:
The Customer Decision Hub is an offering that includes several modules (some included, some optional) you may see referenced in various technical and educational materials such as:
Decision Strategy Manager (DSM) is the name of Pega's decision management module.
Predictive Analytics Director (PAD) is the name of Pega’s predictive modeling module.
Adaptive Decision Manager (ADM) is the name of Pega’s machine learning module.
Visual Business Director (VBD) is the name of Pega’s visualization and simulation module.
Terms such as Decision Management & Decisioning are broad and somewhat nebulous, and so their use may be varied. If they did at one time, they no longer refer specifically to a Pega product offering.