The document discusses best practices for decommissioning custom code with SAP Solution Manager 7.1 SP12+. It describes a four phase approach: 1) Analyze custom code to understand usage, 2) Identify code for decommissioning, 3) Monitor identified code, and 4) Decommission. SAP Solution Manager's Custom Code Lifecycle Management tool supports this process with capabilities like a decommissioning cockpit and lifecycle statuses to track code through the phases.