4. Project Integration Management Changes:
A new process, Manage Project Knowledge, was added. This is a result of many deferred comments from the Fifth Edition indicating the need to address knowledge management in projects. A key output of this process is the lessons
learned register. This register is used throughout many of the processes in the Sixth Edition. This emphasizes the need
to learn continually throughout the project rather than waiting until the end to reflect.
Business documents are inputs to the Develop Project Charter and Close Project or Phase processes. The introduction
of business documents underscores the importance of staying attuned to the business case and benefits management
throughout the project. Administrative closure activities for procurement have been absorbed into the Close Project or Phase process.
As per PMBOK 6th Edition