AND and OR logic in situations

In my webcast last week a couple questions came up about AND and OR logic in the Tivoli Portal.  AND/OR logic comes into the Portal in a variety of ways.  First let's look at a situation example.

In the example below, I've built a situation that looks at a combination of CPU percent and address space name.  In other words the situation will fire only if CPU Percent is within a certain range, and only for certain Job Names.  Note that I've added CPU Percent twice which allows me to do a range, in other words CPU Percent has to be above 1% AND less than 5% AND the alert will only apply to Job Names starting with CXE.  To add OR logic I would add information into line 2 and line 3, as space allows within the situation editor.