What is the MIS system that manipulates information to create business intelligence in support of strategic decision making?

Online analytical processing (OLAP)

Explanation:

OLAP (Online Analytical Processing) is indeed the engineering behind several applications for the Business Intelligence (BI).

OLAP is a dominant information discovery technology as well as for unlimited report viewing abilities, sophisticated analytical computations and qualitative "how about if" (budget, forecast) situation plotting.

This carries out multidimensional business information analysis and offers the resources for mathematical calculations, market analysis, and complex data processing.

Business Performance Management, Development, Financial planning, Predicting, Managerial accounting, Evaluation, Model Systems, Information Discovery, and Data Warehouse Reporting are the foundations for many kinds of enterprise applications.

OLAP allows end-users to undertake multi-dimensional ad-hoc data analysis, thus offering the knowledge and understanding they will have to make informed decisions.