Yes you are correct, you should be able to follow the process when reviewing the logs. The log files are clear text and it can be cumbersome to read them just like that.They are located on a W7/2008R2 machine below C:\ProgramData\Symantec\Symantec Agent\Logs.
if you have a client available in front of you, my suggestion is to register the diagnostics dll located in the agents installation folder: "regsvr32 aexagentdiagnostics.dll" (elevated if UAC used). Don't forget to unregister (using /u) when finished if this is a production end user client. Once registered you can right-click the agent icon and select diagnostics window, here you will find a more structured log viewer for the agent.
Another option is to use the RAAD v2 tool or the Symantec Management Agent Diagnstics Tool. Both can be downloaded from connect and are used for remote client troubleshooting (including log viewing).
In my knowledge I don't think you can skip the assessment scan. It's probably also not a good idea to do so, because its there to make sure no patch is to be installed (and errors out) which might be installed in another way (eg. manually in windows) since the last automatic assessment scan (by default every 4 hours).
kr, dawi_x