There is no specific reporting LIFECYCLE. We can generate the reports from data warehouse/data MARTS or we can generate the reports directly from OLTP systems.What I mean generating reports from OLTP systems is loading data into one system and generating the reports. But this is not recommended. This will depends on the BUSINESS.

1) Generating reports from the OLAP interface system retrieving the data from the data warehouse to generating FORMS and reports.
2) They can use Business intelligence project life cycle.

There is no specific reporting lifecycle. We can generate the reports from data warehouse/data marts or we can generate the reports directly from OLTP systems.What I mean generating reports from OLTP systems is loading data into one system and generating the reports. But this is not recommended. This will depends on the business.

1) Generating reports from the OLAP interface system retrieving the data from the data warehouse to generating forms and reports.
2) They can use Business intelligence project life cycle.