CMMI is a Process Model Framework for process-improvement developed by Software Engineering Institute (SEI), Carnegie Mellon University (CMU), Pittsburgh, USA. CMMI, standing for Capability Maturity Model Integration, is a structured and systematic collection of best practices for process-improvement. The CMMI process model framework is currently available in three constellations â CMMI for Development, CMMI for Services, and CMMI for Acquisition.
Updated March 10, 2017. A file with the XLSB file extension is an Excel Binary Workbook file. They store information in binary format instead of XML like with most other Excel files (like XLSX). Since XLSB files are binary, they can be read from and written to much faster, making them extremely useful for very large spreadsheets.
The .xlsx and .xlsm formats store almost all components of the workbook in XML format, i.e. specially formatted text. This makes it easy for other programs to read and even manipulate the contents of the workbook without having to start Excel. The .xlsb format stores the core components of the workbook in binary format. You need Excel to read and edit it. So the .xlsx and .xlsm formats are more open. For small and medium-sized workbooks, the difference in size and in reading/writing speed between .xlsx/.xlsm on the one hand, and .xlsb on the other hand, are not significant.