Standard Roles for Support activities by OSS

Now, there is no need to assign SAP_ALL to OSS user as SAP has come up with Standard Roles for OSS support professionals performing remote services to clients. This is to bridge security and practicality. SAP Note 1154550 - Standard roles for support activities.
Excerpt from the SAP Note :

Summary
Symptom
In many cases, processing customer messages involves the analysis of the
problem directly in the customer system. For this, users with sufficient
authorization must be provided. However, authorization scope defined
(exactly) for the task is seldom possible because you cannot foresee each
individual process step at the start of the support task.
Most customers solve the problem pragmatically by assigning extended
authorizations up to SAP_ALL. This prevents inconvenient processing delays
due to authorization errors and queries, but also risks unintentional data
changes by the SAP employee.
However, a small group of very security-oriented customers behaves in a
restricted manner and demands a detailed reason for the assignment of each
authorization. The disadvantage of this practice is a massive increase in
processing time.

Cause and Prerequisites
There is no suitable authorization concept to perform support tasks.