The easiest way is to run the Software Execution Report.
When you use Managed Software Delivery Policies for software delivery it's a good idea to make sure your Detection Rules are set correctly and have a compliance check with two shedules:
00:00 No Repeat (will run once as soon as client recieves the Policy)
12.30 Daily (to keep the cleint in compliance)
Especially in large deployments there will always be one or two PCs that fail, maybe because the PC was being shut down as the install was being attempted. The Software Execution Report should be examind for Computers that are running the install repeatedly apparently successfully.