How to identify where a package execution has spent most of the time?

Team BI has a package deployed as a project on SQL Server 2012.

How can I find how long a package takes to run on a daily basis, and where it has spent most of the time?

I know that the catalog.executions view can be queried, anything else?

I am getting this request from developers:

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Today’s BI Incremental ran without error but took far longer than usual. The Sales Incremental took 1hour 12mins. Yesterday it took 15 mins. There has been no release/code changes.

The Sales ETL hits databasename on servername. Was there something going on at the time of the load (5am)? Anything logged?

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