Analytic infrastructure to be the services, applications, utilities and systems that are used for either preparing data for modeling, estimating models, validating models, scoring data, or related activities. For example, analytic infrastructure includes databases and data warehouses, statistical and data mining systems, scoring engines, grids and clouds.
So, this infrastructure will be the main component of all services, apps, utilities and system. The infrastructure will serve the process of all activities that uses the infrastructure itself. The better infrastructure usually will lead to better performance of processing, such as faster and more efficient works (modelling, validating, etc)
We will need Analytics Infrastructre in order to analyse some data, such as customer information data used to segment the market or customer profiling, historical stock price to predict future stock price, customer purchase decision modelling, knowledge management information flow modelling.