No, 3GPP mainly concentrates on the positive scenarios. No, doubt they consider some of the exceptions in case of collisions but not in deep way.
For instance i can tell you for random search procedure there are chances of collisions to get the preamble first. So this scenario has been fully described by them. It is one of the example. Like in this way there might be few more cases.
But in general Operators will have lot of discussions with Vendors for actual implementations. Whatever is defined by 3gpp those things they have to include but there are lot of other things which varies Operator to Operator.
When we do our product testing we usually do our sanity and whatever is defined by 3gpp or RFC spec. But performance has defined no where in those documents but we do those all things. Performance was just an example to tell you that they can not defined each and every parameter in white papers. It would be very difficult.