This paper explores the use of T-splines, a generalization of NURBS, as a basis for isogeometric analysis. T-splines enable local refinement and address limitations of NURBS, such as gaps and overlaps at intersections, and inefficient representation of local features. The authors test T-splines on various fluid and structural analysis problems and find good results. They summarize the current status of T-splines, their limitations, and future possibilities. T-splines are compatible with NURBS and can be used for both surface and solid modeling. The paper discusses the advantages of T-splines over NURBS, including local refinement, better handling of complex geometries, and improved integration with CAD systems. The authors conclude that T-splines offer a promising approach for isogeometric analysis and are well-suited for future engineering design and analysis applications.This paper explores the use of T-splines, a generalization of NURBS, as a basis for isogeometric analysis. T-splines enable local refinement and address limitations of NURBS, such as gaps and overlaps at intersections, and inefficient representation of local features. The authors test T-splines on various fluid and structural analysis problems and find good results. They summarize the current status of T-splines, their limitations, and future possibilities. T-splines are compatible with NURBS and can be used for both surface and solid modeling. The paper discusses the advantages of T-splines over NURBS, including local refinement, better handling of complex geometries, and improved integration with CAD systems. The authors conclude that T-splines offer a promising approach for isogeometric analysis and are well-suited for future engineering design and analysis applications.